Ovulation Test

Tests for Determining Ovulation Date

Ovulation tests assist women in determining their fertile period, typically by detecting hormonal changes indicating the release of an egg from the ovary. These tests can be conducted using urine or saliva samples. Urine tests primarily detect the surge in luteinizing hormone (LH), which precedes ovulation, while saliva tests monitor changes in estrogen levels, which also increase around ovulation.

A positive result in these tests usually indicates that ovulation is imminent, occurring approximately 24-36 hours after the surge in LH or the increase in estrogen is detected. However, it's important to note that these tests should not be relied upon as a sole method of contraception, as they cannot guarantee the absence of fertility. Additionally, while they can help identify the most fertile days in a woman's menstrual cycle, they do not provide a definitive assessment of the likelihood of pregnancy.

Ovulation, which is the release of an egg from the follicles in the ovaries, normally occurs in the middle of each menstrual cycle. Ovulation tests that women can do at home are used to determine the ovulation date, increasing the chances of pregnancy by timing intercourse close to this day. To understand how at-home ovulation tests work, it's necessary to know how ovulation occurs and how the menstrual cycle progresses each month.

How does ovulation (egg release) and the menstrual cycle occur?

The day when menstrual bleeding begins marks the start of a menstrual period (cycle), which typically lasts about a month. (The menstrual cycle refers not only to the days of bleeding but also to the entire period from the first day of one period to the first day of the next.) At the beginning of this period, the FSH hormone, secreted from the pituitary gland in the brain, increases and gradually stimulates the growth of the egg. As the egg follicle grows, it secretes estrogen hormone, which, like FSH, increases progressively. By the middle of the menstrual cycle (i.e., around 14 days after the start of menstruation), FSH and estrogen levels peak, and at the same time, there is a sudden increase in LH hormone secretion from the pituitary gland. This sudden rise in LH hormone (LH surge) is the main mechanism that triggers ovulation. Ovulation occurs 24-36 hours after the LH surge. Ovulation tests done with urine detect this LH surge. Tests done with saliva are based on the increase in estrogen. After ovulation, estrogen, FSH, and LH hormones decrease, while progesterone hormone levels begin to rise. After ovulation, the follicle containing the egg turns into the corpus luteum, releasing progesterone from there. If pregnancy does not occur, the subsequent decrease in progesterone will initiate a new menstrual bleeding. If pregnancy occurs, progesterone will sustain the pregnancy in the uterus and continue to be secreted without decreasing.

Ovulation (egg release) test in urine (LH test):

The urine-based ovulation test detects the increase in LH hormone described above. When LH hormone levels rise in the blood, they also appear in the urine. To detect this LH increase, the test should be done daily in the days leading up to ovulation. For women with regular monthly cycles, the test can start 12 days after the onset of menstruation and continue for 5 days. However, for women with different cycle lengths, the timing of the test will vary. Refer to the table on the right for this. For example, for those with a cycle length of 35 days, they should start the test counting from the first day of menstruation and start on day 18, testing for 5 days. This is because ovulation will occur later in these women. Ovulation typically occurs approximately 14 days before the onset of menstruation. Predicting ovulation day in women with highly irregular periods is challenging, and in such cases, consulting a doctor is recommended regarding when to start the test.

How to use an ovulation test kit?

The procedure for using the tests may vary depending on the brand. In some, the test stick (ovulation kit) is dipped into a container of urine, while in others, it is held in the urine stream while urinating. The instructions for conducting and interpreting the test are detailed on the product's packaging, and they should be followed carefully. It's not advisable to use the first-morning urine for the test, as it can be misleading. Subsequent urine samples can be used. Alcohol, cigarettes, antibiotics, painkillers, suppositories (ovules), etc., do not affect the test, but medications used for ovulation induction, such as hormone injections (trigger shots), can affect or mislead the test. Drinking excessive water and fluids can dilute the urine, reducing the LH concentration, leading to a false negative result. Therefore, it's recommended not to consume excess fluids 2 hours before taking the test.

When the ovulation test yields a positive result:

Depending on the brand, typically, two pink lines indicate a positive test, indicating that ovulation will occur, while a single line indicates no ovulation on that day. If the test is positive (meaning LH surge is detected), it indicates that ovulation will occur approximately 24-36 hours later. In this case, it's advisable to have intercourse 24 hours after administering the ovulation test. This is because ovulation occurs 24-36 hours after the LH surge, and the egg cell can live for about 24 hours. Sperm can live for an average of 3 days, while a woman's egg can survive for about 1 day. Therefore, pregnancy can occur even if intercourse doesn't happen on the exact ovulation day. For example, in a woman who will ovulate on the 10th of the month, pregnancy can occur even if intercourse happens on the 7th or 8th because sperm can survive for 3 days. Similarly, intercourse on the 11th can result in pregnancy because the egg cell can survive for 24 hours. Hence, there's a window of about 5 days before and after ovulation when a woman can conceive. Pregnancy is not possible on other days, even if intercourse occurs.

Note: Ovulation tests cannot be used as a contraceptive method.

It's impossible to determine safe days for intercourse and prevent pregnancy solely based on ovulation tests. This is because the days of potential pregnancy vary due to the survival times of sperm and the egg. For example, pregnancy can occur based on intercourse that happened before taking the test.

Ovulation Test (Ovulation Predictor Kit) When to Do?

If the normal menstrual cycle occurs every 28 days, ovulation typically occurs within 10 to 14 days before the onset of menstruation. If the menstrual cycle lasts around 28-32 days on average, ovulation usually happens between the 11th and 21st days.

An ovulation test can be done at any time of the day, but more reliable results are often obtained in the morning. If the ovulation test results positive, it is considered an indication of being in the ovulation period, and if sexual intercourse takes place within 24 hours, the chances of pregnancy increase.

Ovulation tests using saliva:

These tests rely on detecting the increase in estrogen hormone during the mid-cycle days, as described earlier. They are not as practical as urine tests and are not as widespread.

Detection of ovulation (egg release) through blood tests or ultrasonography:

LH hormone levels can be measured in the blood, and ovulation can be predicted based on its elevation, although this method is not commonly used. Instead, ultrasonography can indicate ovulation when the egg has grown to a certain size. Ovulation occurs when the egg (follicle) size reaches approximately 18-20 mm. Additionally, a high progesterone level measured in the blood one week after ovulation (on the 21st day of the cycle) confirms ovulation for that month when necessary. Sometimes, fluid in the abdomen and the area where ovulation occurred can be seen on ultrasound shortly after ovulation, but this is not always feasible.

Luteinizing Hormone (LH) Level Measurement with Urine Test Kits:

Various ovulation detection tests are available at pharmacies, typically utilizing test strips that show changes in LH levels in urine. Ovulation generally occurs within 12 to 36 hours after the LH surge. Urine testing usually begins around two days before the expected ovulation day. In women with a 28-day menstrual cycle, ovulation typically occurs between days 13 and 15. For women with irregular periods, urine testing should be timed based on the earliest and latest possible ovulation days. If menstrual cycles occur every 27-34 days, ovulation usually happens between days 13 and 20. Therefore, testing should start on day 11 and continue until ovulation is detected or until day 20. The chance of detecting ovulation with a 5-day test is 80%, while it increases to 95% with a 10-day test. Once ovulation is detected, there's no need to continue testing. Sometimes, ovulation may not occur.

If ovulation is not detected over two or more consecutive menstrual cycles, there may be an ovulation issue.

Hormone LH Level Measurement with Blood Tests:

Elevated progesterone levels in the blood are typically observed alongside ovulation. A blood test for progesterone measurement can be conducted approximately one week before the expected start of the next menstrual period. The LH surge occurs just before ovulation. The LH level in the blood or urine can be measured to determine when the follicle will mature and be ready for ovulation. Estrogen is secreted by the developing follicle and rapidly rises just before ovulation. If ovulation is induced with medication, frequent measurement of estrogen levels may be necessary to determine follicular development.

Ovulation Calculation

To calculate ovulation, it's necessary to know the time intervals of the individual's menstrual cycle. If the menstrual cycle occurs every 28 days, ovulation is expected to happen approximately 14 days before the start of the next menstrual period. Therefore, the number of days between two menstrual cycles provides the correct estimate for ovulation.

Ultimately, ovulation tests serve as a useful tool for couples trying to conceive by providing guidance on the timing of intercourse to maximize the chances of pregnancy. However, they should be used in conjunction with other fertility awareness methods for a more comprehensive approach to family planning.

In couples seeking to conceive, ovulation disorders, also known as ovulatory dysfunction, which affect approximately 15% of cases, can be a contributing factor. These disorders can range from severe (anovulation) to mild (oligo-ovulation) and may hinder pregnancy.

The presence and timing of ovulation can be determined through various methods, all of which rely on the hormonal events of a normal menstrual cycle. Some tests are simple, while others are complex and costly. However, no test can definitively confirm ovulation; pregnancy remains the only conclusive evidence.

Ovulation Calculator

Determining the Optimal Time for Pregnancy

Determining the ovulation period is crucial for calculating the most suitable time for pregnancy. The likelihood of achieving pregnancy is higher when sexual intercourse occurs around these dates. For women with regular menstrual cycles, ovulation occurs approximately 14 days before the onset of menstruation, making it the most practical way to determine the ovulation day. In the case of a 28-day menstrual cycle, ovulation typically occurs on the 14th day, which is approximately 14 days from the start of menstruation. Starting 2-3 days before this day and continuing for a week, engaging in sexual intercourse every 2-3 days will increase the chances of conception. (In other words, it is recommended to initiate intercourse 17-18 days before the onset of menstruation and continue every 2-3 days for a week). It is not advisable to engage in intercourse daily as it may reduce sperm count, hence intercourse every two days is recommended. For women with regular 30-day menstrual cycles, ovulation is calculated to occur on the 16th day from the beginning of menstruation. In the case of women with regular 35-day menstrual cycles, ovulation generally occurs around the 21st day from the beginning of menstruation. It is more challenging to predict the ovulation day for women with irregular menstrual cycles. However, ovulation typically occurs approximately 14 days before the onset of menstruation. The aforementioned guidelines are provided in a manner where the days are counted backwards from the upcoming menstruation (e.g., initiate intercourse 17-18 days before the onset of menstruation). This is because calculating the ovulation day based on the upcoming menstruation is more reliable. (The luteal phase duration between ovulation and menstruation is fixed at 14 days).

How does Ovulation Calculator Work?

The ovulation calculator works based on the menstrual cycle and the length of the luteal phase. The luteal phase remains constant and typically lasts for 14 days. Subtracting 14 days from the menstrual cycle length gives an estimate of the ovulation day or the probable ovulation date. The menstrual cycle is the number of days between each period. If your periods are regular, it's usually around 28 days. You can use the ovulation calculation program below to calculate your ovulation date...


How long was your last cycle? :  days
(The duration between two menstrual periods, the number of days from the first day of one period to the first day of the next)

Select the first day of your last period:

Estimated ovulation date:


If you track certain signs of ovulation consistently or undergo an ovulation test, you can accurately determine the ovulation date.

  • In many cases, you can get pregnant within 24 hours after ovulation. The lifespan of an egg is a maximum of 24-36 hours. If you don't conceive during this time, the egg dies and is expelled from the body. The date of menstruation may vary each month, but the luteal phase remains the same. The luteal phase covers the period after ovulation until menstruation and typically lasts for 14 days.

  • To calculate the ovulation date or period, subtract the length of the luteal phase from the menstrual cycle (the number of days from the first day of your period to the first day of the next period). For example: If you have a 28-day cycle, subtracting 14 days (the length of the luteal phase) gives you a date around 14 days after the first day of your period, which is likely your ovulation date.

  • If you have a 30-day cycle, the luteal phase remains the same, so subtracting 14 days leaves 16 days. This means ovulation will likely occur around 16 days after the first day of your period.

  • The calculated date of ovulation is not exact; ovulation can occur a day earlier or later. Therefore, if you want to conceive, have intercourse one or two days before the calculated date. Having intercourse four days before the calculated date can also increase your chances of conception because sperm can survive in the female body for up to 4-5 days.

Ovulation Phase or Fertility Period Calculation?

The ovulation phase or fertility period refers to the time when you are most likely to conceive or the fertility window. This period can be calculated based on the lifespan of sperm in the body. Since sperm typically survives for 4-5 days, having intercourse four days before ovulation or within 24-36 hours after ovulation can lead to conception. This is called the fertility phase or ovulation phase.

Does the Ovulation Calculator Provide the Exact Ovulation Date?

No, the ovulation calculation program or ovulation calculation chart can only estimate or calculate the probable ovulation period. You can also determine your ovulation date accurately by observing certain body signs. For example, around the time of ovulation, vaginal discharge increases, and you may feel more wet. Additionally, during ovulation, the discharge is typically clearer, more transparent, and more slippery. These changes during the ovulation period aim to create a suitable environment for sperm, allowing them to reach the egg more easily.

What if Your Periods are Irregular?

If your periods are highly irregular, ovulation calculation programs may not be beneficial for you. Ovulation calculation programs are generally for women with regular periods. In this case, you should look for signs of ovulation or take an ovulation test.

Can You Get Pregnant if You Have Intercourse After Ovulation?

If you have intercourse one or two days after ovulation, you still have a chance of getting pregnant, but this risk is very low. If you have intercourse three days after ovulation, your chance of getting pregnant is almost 0%.

Can Ovulation Occur Immediately After Menstruation?

Yes, ovulation can occur immediately after menstruation. If you have very short intervals between periods and your menstrual period lasts a bit longer, ovulation immediately after menstruation is possible.


Understanding Ovulation and Fertility

Determining the optimal time for pregnancy involves understanding the ovulation period and fertility window. The ovulation calculator is a tool that utilizes the menstrual cycle and luteal phase to estimate the ovulation date and fertility period. Ovulation Calculator Working Principle The ovulation calculator estimates the ovulation date by subtracting the fixed luteal phase (typically 14 days) from the length of the menstrual cycle. It then provides an estimated ovulation date or period, helping individuals identify the most fertile window for conception. Calculating Ovulation Date The ovulation date can be calculated by subtracting the luteal phase from the menstrual cycle: For a 28-day cycle, ovulation is estimated to occur around 14 days after the first day of menstruation. For a 30-day cycle, ovulation is likely to occur approximately 16 days after the start of menstruation. Fertility Phase or Ovulation Phase

The fertility phase, also known as the ovulation phase, refers to the period when conception is most likely. This window is determined based on the lifespan of sperm, which can survive in the female body for 4-5 days. Intercourse four days before ovulation or within 24-36 hours after ovulation maximizes the chances of conception.

Accuracy of Ovulation Calculator

The ovulation calculator provides an estimated ovulation period rather than an exact ovulation date. It is recommended to observe body signs such as changes in vaginal discharge and consider ovulation tests for accurate determination of ovulation. Irregular Menstrual Cycles For individuals with irregular periods, ovulation calculation programs may not be as effective. In such cases, monitoring signs of ovulation or using ovulation tests is advised. Timing of Intercourse for Conception Having intercourse 1-2 days before the calculated ovulation date increases the likelihood of conception. Sperm can survive in the female body for up to 4-5 days, further extending the fertility window.

Ovulation Timing and Pregnancy

While the chances of pregnancy decrease significantly after ovulation, there is still a low possibility of conception if intercourse occurs 1-2 days after ovulation. However, the likelihood decreases to nearly zero if intercourse takes place three days after ovulation.

Ovulation Occurrence Post-Menstruation Ovulation can occur immediately after menstruation, especially for individuals with short menstrual cycles and longer periods. This indicates the potential variability in ovulation timing based on individual menstrual patterns.

Understanding ovulation, fertility phases, and the use of an ovulation calculator can significantly aid individuals in determining the most suitable time for pregnancy. However, it's important to consider individual variations in menstrual cycles and seek additional methods for accurate ovulation tracking, especially for those with irregular periods.

Pregnancy Test

Pregnancy begins when the sperm from the man fertilizes the egg cell released from the woman's ovaries. The period from this moment until the end of the 8th week is called the embryonic period, and from the 8th week until birth, it is referred to as the fetal period.

Once the embryo implants into the endometrium, the inner lining of the uterus (about 5-6 days after fertilization), the pregnancy hormone called human chorionic gonadotropin (HCG) is secreted by the cells surrounding the embryo. The main principle of pregnancy tests is to detect this pregnancy hormone.

As pregnancy progresses, the β-HCG hormone, which increases in the blood, begins to appear in the urine after surpassing a certain threshold, leading to a positive result in the urine pregnancy test. A blood pregnancy test also measures the amount of B-HCG in the blood and can detect the presence or absence of pregnancy even before a menstrual delay. Urine tests can never reach the reliability of blood tests. While the presence of pregnancy is unlikely to be falsely indicated in a urine test, if it shows the absence of pregnancy, considering the possibility of early pregnancy, the test should be repeated after some time. (In very early pregnancies, the urine test may not detect the pregnancy. This situation may also apply to the blood test with a very low probability.)

The BETA-HCG hormone measured in the blood is used to detect pregnancies that cannot be detected by urine tests or seen with ultrasound, as well as in the diagnosis and monitoring of conditions such as ectopic pregnancy, miscarriage, and molar pregnancy (also known as a hydatidiform mole). You can find detailed information about blood pregnancy tests and B-HCG hormone by clicking here.

When does the urine pregnancy test give results after intercourse?

The urine pregnancy test cannot give results in the days immediately after intercourse. Generally, it is necessary to wait until a menstrual delay for it to give accurate results.

The reason for this: The logic behind the urine pregnancy test is based on the HCG hormone, which is formed due to pregnancy, passing from the mother's blood to the urine and being detected in the urine. Pregnancy can occur in the days close to the ovulation period. Even if pregnancy occurs with intercourse close to the ovulation day, it takes 6-10 days for the pregnancy to progress to the uterus and settle there. After settling in the uterus, the HCG hormone secreted from the pregnancy can pass into the mother's blood. In fact, it may take a few more days for this hormone to pass from the mother's blood to her urine. Because of all these, in short, if pregnancy occurs after intercourse close to the ovulation period, it takes almost 15 days for the HCG hormone, which is secreted due to this pregnancy, to pass into the mother's urine. This corresponds to the next menstrual period, that is, the time when the pregnancy occurs and the delay in the period is expected to coincide.

Therefore, if there is suspicion of pregnancy after intercourse, the urine pregnancy test should be done after a menstrual delay. If no pregnancy is detected in the test, it should be repeated one week later to increase reliability. In this way, the reliability of the test, which is 90% in the first test, can increase to 95% if the second test is performed.

A positive test result (indicating pregnancy) is more reliable than a negative result (indicating no pregnancy). However, in any case of menstrual delay, it is important to consult a doctor because even if the test indicates pregnancy, it may not be a normal pregnancy; it could be an ectopic pregnancy. Even if the test indicates no pregnancy, you may be pregnant without realizing it.

Diagnosis of Pregnancy with Ultrasound:

When the period is delayed by a week, which means the pregnancy is 5 weeks old, the pregnancy sac can be seen with a vaginal ultrasound; for it to be seen with an abdominal ultrasound, the pregnancy needs to be at least 6 weeks old, which means a delay of 2 weeks in the period.

The pregnancy sac can be seen with a transvaginal ultrasound when the pregnancy test (BHCG) value reaches 1500. The pregnancy sac can be seen with an abdominal ultrasound when the BHCG value reaches 2000-3000; it cannot be seen earlier.

A positive pregnancy test is definite evidence of the presence of pregnancy in the body, but this pregnancy may not be a normal one; it could be inside or outside the uterus (ectopic pregnancy). Whether the pregnancy is inside the uterus can only be determined with ultrasound, not with urine or blood pregnancy tests.


Pregnancy tests are used to determine whether a woman is pregnant or not. These tests are based on detecting the pregnancy hormone HCG. Urine pregnancy test generally needs to be done after the menstrual delay in order to give accurate results.

Result of Urine Pregnancy Test

Urine pregnancy test cannot give results in the days immediately after intercourse; it should be done after waiting for a menstrual delay.

Even if pregnancy occurs due to intercourse close to the ovulation day, it may take 6-10 days for the pregnancy to settle in the uterus and for the HCG hormone to pass into the urine.

If there is suspicion of pregnancy after intercourse, the urine pregnancy test should be done after a menstrual delay. If no pregnancy is detected in the test, it should be repeated one week later.

Reliability of Pregnancy Test

A positive result of the test (indicating pregnancy) is more reliable than a negative result.

In case of any menstrual delay, it is important to consult a doctor regardless of the test result, as the pregnancy may not be a normal one.

Diagnosis of Pregnancy with Ultrasound

When the period is delayed by a week, the pregnancy sac can be seen with a vaginal ultrasound; for it to be seen with an abdominal ultrasound, the pregnancy needs to be at least 6 weeks.

When the pregnancy test (BHCG) value reaches 1500, the pregnancy sac can be seen with a transvaginal ultrasound. When the BHCG value reaches 2000-3000, the pregnancy sac can be seen with an abdominal ultrasound.

Result of the Pregnancy Test

A positive pregnancy test is definite evidence of pregnancy in the body, but this may not be a normal pregnancy.

Whether the pregnancy is inside the uterus or not can only be determined through ultrasound, not through urine or blood pregnancy tests.

In light of this information, it is important to follow the monitoring processes recommended by the doctor based on the results of the pregnancy test.

Pregnancy Symptoms

The following conditions require a woman to suspect pregnancy:

Missed period: This is the most important condition that raises suspicion of pregnancy and is usually the first indicator of pregnancy. Even if a woman who has missed her period uses a contraceptive method such as an intrauterine device or birth control pills, she should still suspect pregnancy and should undergo a pregnancy test or ultrasound examination to be certain. You can access detailed information about pregnancy tests by clicking here. However, not every missed period indicates pregnancy.

*Nausea, vomiting

*Intolerance to food odors

*Fullness and sensitivity in the breasts

*Frequent urination

*Fatigue, tiredness

*Propensity to sleep

*Pelvic pain

A pregnancy test and ultrasound examination are necessary for a definite pregnancy diagnosis. Even if a pregnancy test is positive, it does not necessarily mean it is a normal pregnancy, so the pregnancy diagnosis must be confirmed with an ultrasound. It is possible that in the early days and even the first weeks of pregnancy, the pregnancy may be too small to be seen on ultrasound. However, when 5-6 weeks have passed since the last period, the pregnancy becomes visible on ultrasound. When the HCG level in a pregnancy blood test reaches 1200-1500, the pregnancy becomes visible on a vaginal ultrasound.

Questions and  Answers about Pregnancy Symptoms

How do pregnancy symptoms occur?

Suspicion of pregnancy generally begins with a missed period, but this is not always the case because a woman may mistake bleeding during the implantation of the pregnancy for her menstrual period. In this case, pregnancy may have started without a suspicion of a missed period. In the following weeks, around 5-6 weeks of pregnancy, symptoms such as loss of appetite, nausea, vomiting, and breast tenderness slowly begin, but this is not always the case. Pregnancy can progress without these symptoms, and a woman may only realize she is pregnant during an examination.

Does the absence of pregnancy symptoms mean something is wrong?

No, pregnancy symptoms do not occur with the same frequency and intensity in every pregnancy. Some women may have no pregnancy symptoms in the early months. This does not indicate a problem or show that there is an issue with the baby.

Do pregnancy symptoms differ between male and female babies?

No, there is no such difference. A woman's symptoms, her reactions to foods and drinks, or her favorite foods do not provide any indication of the baby's gender, whether it is a boy or a girl. Such statements do not have a factual basis.

I have pregnancy symptoms but the pregnancy test is negative, am I pregnant?

Nausea, vomiting, loss of appetite, fatigue, pelvic pain, and other pregnancy symptoms do not only occur in pregnancy; they may also occur in other diseases and conditions, leading to confusion with pregnancy. Therefore, it is essential to clarify the situation with a pregnancy test and a doctor's examination. Because a pregnancy test in the blood is more reliable, if pregnancy does not show up in a blood test, it is highly likely that there is no pregnancy. Although a pregnancy test in the urine is not as reliable as a blood test, it is more reliable than symptoms. In short, one should not be deceived by symptoms similar to pregnancy; the situation should be clarified with a doctor's examination and pregnancy tests, and if necessary, with ultrasound. Not every woman with symptoms similar to pregnancy is pregnant.

My blood pregnancy test is positive (pregnancy is present), but I have no symptoms

This does not indicate a problem. Some women may have very few or no pregnancy symptoms. If the blood pregnancy test, i.e., B-HCG, is positive, there is a pregnancy, but whether it is a normal pregnancy should be ascertained through continued examinations and monitoring of the pregnancy.

I had many symptoms in my first pregnancy, but I have none in this pregnancy

Symptoms may not be the same in every pregnancy. This does not provide any indication of the health of this pregnancy or the gender of the baby. Some women may have more pregnancy symptoms and complaints in their first pregnancy and fewer in subsequent pregnancies, while some women may have the opposite, having more complaints in their first pregnancy.

My pregnancy symptoms suddenly disappeared, is something wrong?

Nausea and vomiting, which are symptoms of pregnancy, usually subside around 12-14 weeks. The disappearance of these symptoms or the subsidence of symptoms such as pelvic pain, fatigue, and frequent urination does not indicate a problem. As the uterus grows and moves upward, relieving the pressure on the bladder, the complaint of frequent urination may suddenly disappear after the third month. Therefore, the disappearance or reduction of symptoms does not indicate a problem.

I was told that the baby is dead (or I had a miscarriage), but I still have pregnancy symptoms

In cases such as miscarriage, blighted ovum, ectopic pregnancy, molar pregnancy, or even a dead pregnancy, the pregnancy hormone (HCG hormone) is present in the blood, so pregnancy symptoms may occur just like in normal pregnancies. After a miscarriage or curettage, the pregnancy hormones in the blood do not immediately drop to zero; it takes a few weeks for the hormones to completely reset.


Pregnancy Symptoms and Information

Pregnancy symptoms include conditions that lead a woman to suspect pregnancy. These symptoms generally include:

*Missed period

*Nausea and vomiting

*Intolerance to food odors

*Fullness and sensitivity in the breasts

*Frequent urination

*Fatigue, tiredness

*Propensity to sleep

*Pelvic pain

Pregnancy Diagnosis and Tests

Here's some information about pregnancy diagnosis and tests:

*A missed period is usually the first sign of pregnancy, but a pregnancy test and ultrasound are necessary for a definitive diagnosis.

*Even if a pregnancy test is positive, it should be confirmed by ultrasound. The pregnancy becomes visible on ultrasound at 5-6 weeks.

*When the HCG level in a pregnancy blood test reaches 1200-1500, the pregnancy becomes visible on a vaginal ultrasound.

Frequently Asked Questions about Pregnancy Symptoms

*Pregnancy symptoms may not occur with the same frequency and intensity in every woman. Some women may have no symptoms at all.

*Pregnancy symptoms do not differ between male and female babies.

*Even if pregnancy symptoms are present, a pregnancy test may be negative. In this case, the situation should be clarified with a doctor's examination and blood test.

*The absence of pregnancy symptoms does not necessarily mean there is no pregnancy. Some women may have few or no symptoms.

Variability of Pregnancy Symptoms

*Symptoms may differ in each pregnancy. Even if a woman had many symptoms in her first pregnancy, she may have few symptoms in subsequent pregnancies, which is normal.

*Pregnancy symptoms may decrease or disappear over time, which is generally a normal development.

*Pregnancy symptoms can also occur in cases of miscarriage, blighted ovum, or ectopic pregnancy.

*This information provides a general overview of pregnancy symptoms and commonly asked questions about pregnancy. However, consulting a healthcare professional is always advisable.

Formation of Pregnancy

What is necessary for pregnancy formation?

For pregnancy to occur, the following are necessary:

*Normal production of sperm with the correct characteristics in men

*Open and sufficient function of the sperm ducts

*Production of egg cells in women

*Open fallopian tubes in women

*Sexual intercourse on ovulation days

*The meeting of sperm and egg and fertilization

*Suitable uterine function for the implantation of the fertilized egg

*The fertilized egg settling in the uterus and taking the form of an embryo and fetus (fetus)

*Birth of the fully developed baby

Sperm Production

The male reproductive cell, sperm, is produced in the testes. Unlike in females, production starts at puberty in males and continues until the end of life. The main sperm cells (spermatogonia) that will produce sperm are present in the male testes at birth. Until adolescence, these cells remain dormant. With the increase in hormones (FSH, LH) secreted by the brain at puberty, division of the main sperm cells inside the testes begins. The newly formed cells go through various division, development, and differentiation stages to become sperm.

Approximately 50,000 to 200,000 sperm are produced per minute in the testes. The sperms formed in the channels of the testes enter a canal system called the epididymis. Here, the sperms continue to mature, and when they reach the tail of the epididymis, they gain the ability to move independently. The complete development of a sperm cell from start to maturity takes about 70 days.

A sperm is about 5-7 microns long, 3-4 microns wide, with a pear-shaped head, a neck about 2-3 microns long, and a tail about 40-45 microns long.

Ejaculation of Sperm

When sexual arousal occurs, sperm cells accumulate in the secretions of the seminal vesicles and prostate, as well as in the posterior urethra and ejaculatory ducts. For accumulation, the upper part of the urethral canal in the prostate and the lower part of the prostate are kept closed by the sphincter mechanism, preventing the accumulated fluids from escaping into the bladder and urethra. The accumulated fluid is called semen.

When sexual arousal reaches its peak, the ejaculation reflex begins. While the inner sphincter of the urethra remains closed, the outer sphincter opens. At the same time, the muscles in the urethra and ejaculatory ducts contract rapidly and rhythmically. With these contractions, semen is expelled through the urinary opening in spurts.

Production of Egg Cells

The tissues on both sides of the lower back of the fetus in the mother's womb begin to differentiate into either testes or ovaries based on the chromosomal structure of the fetus. The main egg cells (oogonia) become apparent in the ovaries around the 6th week of pregnancy. These main egg cells multiply by division until the 20th week. After that, these cells, which have 46 chromosomes, enter a division stage that reduces the number of chromosomes by half. This division, which occurs between the 7th and 9th months of pregnancy, is not completed. The cells that remain in the division stage are called oocytes. Surrounded by a layer of cells, the oocytes start waiting silently in the ovary. Their number is determined and remains unchanged. Unlike in men, the female ovary has a specific number of reproductive cells.

From birth to adolescence, the oocytes wait unchanged in the ovary, and after adolescence, they develop into mature egg cells. However, while 99% of them are lost for various reasons, only about 1% of them develop into egg cells.


Around the 14th day of a woman's menstrual cycle, the amount of the hormone LH secreted by the pituitary gland (the region of the brain that secretes hormones) suddenly increases. Subsequently, the membrane of the mature follicle ruptures, releasing the egg cell. This event is called ovulation.

During the development of the egg cell in the ovary, hormones called estrogen and progesterone are produced. In the first period of the cycle before ovulation, estrogen, and in the second period after ovulation, progesterone, make the tissues inside the uterus suitable for the implantation of the fertilized egg. Otherwise, if the fertilized egg does not implant in the uterus, a miscarriage will occur.


Fertilization is the union of the male reproductive cell, sperm, with the female reproductive cell, egg, resulting in the sperm entering the egg. This event takes place inside one of the woman's fallopian tubes.

During sexual intercourse, after ejaculation, the sperm in the semen rapidly enter the uterus through the cervix, the neck of the womb. From there, the sperms move upwards inside the uterus and then enter the fallopian tubes.

After the egg cell is released from the woman's ovary, it falls into the lower part of the abdominal cavity. The place where it falls is close to the free end of the fallopian tube, which has extensions like the fingers of a glove. The egg cell is taken into the tube by the extensions. As the egg cell is slowly conveyed towards the uterus inside the tube, if there is a sperm cell that has reached the tube, the meeting required for fertilization takes place.

After the sperm and egg cell meet, the sperm enters the egg by breaking through its membranes using enzymes in the head. Once a sperm enters the egg, it changes the properties of the egg's membrane, preventing other sperm from entering.


After fertilization, the fertilized egg (zygote) remains silent for about 30 hours without any visible change. At this time, the chromosomes from the male and female have combined to form the chromosomes of the new organism. After fertilization inside the fallopian tubes, the zygote moves towards the uterus. It takes 3-5 days to reach the uterus. During this time, the zygote divides and multiplies. The number of cells increases to 2, 4, 8, 16, and so on. At the implantation stage, the zygote is composed of cells arranged in a single layer surrounding a cavity. The cells in one part of this cell group develop more in number and in layers. This region is the attachment area to the uterus. At this stage, the new organism is called an embryo.

Implantation begins between the 5th and 8th days after fertilization and is completed by the 9th or 10th day. Therefore, the process of fertilization and implantation is completed about 4-5 days before a woman's period. When the woman realizes she is not having her period, the embryo is about 15-20 days old.

After implantation in the uterus, the embryo continues to develop rapidly. The period from fertilization to the end of the second month is called the embryonic period. The new organism, now called a fetus, continues its development until birth.

Most abnormalities in the developing fetus occur in the first 12 weeks. Therefore, the mother should avoid drugs, vaccines, harmful chemicals, viruses, and certain infections, as well as radiation and similar harmful factors.

The fetus in the mother's womb is attached to the placenta (the baby's companion) through the umbilical cord. The placenta is also attached to the uterus. The placenta allows the exchange of nutrients and various substances between the mother's blood and the baby's blood without mixing them. This way, the fetus receives nutrients from the mother and gives back waste products. The placenta is permeable to certain hormones, chemical substances, microorganisms, and small molecules. Therefore, some harmful factors affecting the mother also affect the child. For example, a mother's smoking and alcohol consumption directly affect the child. Similarly, the hormones released in the mother's stress affect the fetus through the placenta.

Implantation Calculator

Implantation Bleeding Calculator, Calculating Implantation Date

When the fertilized egg attaches to the uterine wall, it marks the beginning of the first phase of pregnancy known as implantation, leading to implantation bleeding. Implantation bleeding typically occurs around 9 days after ovulation, sometimes extending to 12 days post-ovulation. The following implantation bleeding calculator operates based on the first day of the last menstrual period. This program estimates the low, medium, and high probability days for implantation bleeding.

Implantation bleeding occurs after ovulation because for implantation bleeding to happen, the fertilized egg must adhere to or embed itself into the uterine wall. The nature of implantation bleeding varies, ranging from spotting in some women to minimal bleeding that may go unnoticed in others.

If you have regular menstrual cycles occurring every 28 days, your likely ovulation date is around 14 days after the first day of your period. Adding 10 days to this provides an estimated implantation bleeding date 24 days after the first day of your period.

It's important to note that implantation bleeding doesn't occur in all women; approximately one-third of pregnant women experience it. Therefore, the absence of expected implantation bleeding or slight dark bleeding on the anticipated date doesn't necessarily mean you're not pregnant. In short, relying solely on implantation bleeding is not a definitive indicator of pregnancy. If you want assurance, consider taking a pregnancy test after a missed period.

How is implantation date calculated?

Pregnancy begins after the egg is fertilized by sperm. The fertilized egg, called a zygote, then develops into an embryo and attaches to the endometrial lining of the uterus. As the embryo attaches to the uterine wall, some capillaries may be damaged, resulting in bleeding, known as implantation bleeding.

Implantation bleeding typically occurs 9-13 days after ovulation.

If you have a menstrual cycle of 28 days, ovulation most likely occurs around day 14 after the first day of the last period.. In this case, implantation bleeding can occur between days 24-27 of the menstrual cycle.

If your menstrual cycle is 30 days, ovulation probably occurs around day 16 after the first day of the last menstrual period.. In this case, implantation bleeding can occur between days 26-29.

If your menstrual cycle is 32 days, ovulation likely occurs around day 18 after the first day of the last menstrual period.. In this case, implantation bleeding can occur between days 28-31.

Implantation bleeding usually occurs 2-5 days before the expected period date, though this can vary from woman to woman.

Feel free to use the following implantation bleeding calculator program to estimate the potential date of implantation bleeding.

Implantation Bleeding Calculator

Implantation Bleeding Calculator

Can you calculate due date by implantation date?

Estimating the due date based on the implantation date involves considering the typical duration of pregnancy, which is around 40 weeks. Implantation usually occurs approximately 10 to 14 days after conception, when the fertilized egg attaches to the uterine wall. To calculate the estimated due date:

Identify Implantation Date: Determine the date when implantation likely occurred, usually around 10-14 days after conception.

Add Weeks: Add 37 weeks to the implantation date as a starting point. This is the lower end of the typical pregnancy duration.

Calculate Upper Limit: Add 40 weeks to the implantation date to account for the upper limit of the usual pregnancy duration.

This range (from 37 to 40 weeks) gives you an estimated window for the due date. However, individual variations, health conditions, and other factors can influence the actual length of a pregnancy. It is advisable to consult with healthcare professionals for a more accurate assessment and personalized guidance during the course of the pregnancy.

How do you know implantation date?

Generally, the exact day of implantation cannot be pinpointed, but an estimate can be made by tracking women's specific signs and their menstrual cycles. Some women may experience implantation bleeding or mild cramps. However, these signs may not be consistent for every woman and might go unnoticed. To determine the exact day of implantation, doctors often use ultrasound or other medical methods.

Determining the exact day of implantation is inherently challenging due to several factors, and it often involves estimation rather than precise calculation. Here's a more detailed breakdown:

Ovulation Timing: Implantation generally occurs 8-12 days after ovulation. Tracking ovulation can be done through methods such as charting basal body temperature, using ovulation predictor kits, or monitoring changes in cervical mucus.

Fertilization and Journey to the Uterus: Once an egg is fertilized by sperm, it forms a zygote. The zygote then undergoes cell division as it travels through the fallopian tube toward the uterus.

Implantation Process: Implantation is the phase when the developing embryo attaches to the lining of the uterus. This usually happens between days 8 to 12 post-fertilization, although variations can occur.

Symptoms of Implantation: Some women may notice mild symptoms around the time of implantation. This can include light spotting, mild cramping, or changes in cervical mucus. However, not every woman experiences these symptoms, and they can be subtle.

Confirmation through Pregnancy Tests: Implantation triggers the release of the hormone hCG (human chorionic gonadotropin). Pregnancy tests detect hCG levels in urine or blood, providing confirmation of pregnancy. Testing too early, before implantation occurs, may yield false negatives.

Ultrasound for Confirmation: Healthcare professionals often use ultrasound to confirm pregnancy and estimate gestational age. In early ultrasounds, the developing gestational sac and embryo can be visualized, offering a more accurate assessment of the pregnancy's progression.

Menstrual Cycle Variability: Individual variations in menstrual cycle length and irregularities can impact the accuracy of estimating implantation and due dates.

For the most precise information, it's recommended to consult with healthcare professionals who can use a combination of methods, including ultrasound, to assess the progress of pregnancy and estimate the due date more accurately.

How many days pregnant am I during implantation?

During implantation, which typically occurs around 6 to 12 days after conception, a woman would be considered around 23 to 27 days pregnant. This is because pregnancy is dated from the first day of the woman's last menstrual period, so by the time implantation occurs, she is considered to be in the early stages of pregnancy.

Menstrual Cycle Basics:

The menstrual cycle is counted from the first day of a woman's last menstrual period (LMP).

On average, a menstrual cycle is around 28 days, but it can vary widely among women.


Ovulation occurs roughly in the middle of the menstrual cycle (around day 14 in a 28-day cycle).

An egg is released from the ovary during ovulation.


If sperm meets the egg during or shortly after ovulation, fertilization can occur.


After fertilization, the fertilized egg (zygote) travels down the fallopian tube and into the uterus.

Implantation is the process where the zygote attaches to the uterine lining (endometrium).

This typically happens around 6 to 12 days after fertilization.

Pregnancy Calculation:

Pregnancy is dated from the first day of the woman's LMP, not from conception.

By the time implantation occurs, the woman is considered to be around 3 to 4 weeks pregnant.

What is the most common implantation date?

The most common implantation day typically occurs around 9 to 10 days after ovulation, which is approximately 8 to 9 days after fertilization. However, implantation can occur anywhere from 6 to 14 days after ovulation, with the average being around 9 days. Keep in mind that these are general estimates, and individual variations can occur.

Is implantation the day you conceived?

No, implantation is not the day you conceived. Conception occurs when a sperm fertilizes an egg, forming a zygote. After conception, the zygote begins to divide and travel down the fallopian tube. Implantation happens when the developing embryo attaches itself to the lining of the uterus, which typically occurs about 6 to 10 days after conception. So, implantation is a separate event that follows conception.

Conception, also known as fertilization, takes place when a sperm successfully penetrates an egg, resulting in the formation of a zygote. Following conception, the zygote undergoes a series of cell divisions as it moves through the fallopian tube toward the uterus.

Implantation, on the other hand, is the process where the developing embryo embeds itself into the lining of the uterus. This typically occurs around 6 to 10 days after conception. Implantation is a crucial step for a pregnancy to progress because it establishes the necessary connection between the embryo and the mother's body for the exchange of nutrients and waste.
What is the difference between implantation bleeding and menstrual bleeding?
Implantation bleeding typically lasts one to two days, whereas menstrual bleeding generally lasts 4-7 days.

The color of implantation bleeding is usually pink or brown, while menstrual bleeding is typically red.

The amount of implantation bleeding is minimal, appearing as just a few spots on a woman's underwear. In contrast, menstrual bleeding is more substantial and continuous.

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