On what day after ovulation should a pregnancy test be taken? What is DPO in pregnancy planning, transcript. Signs of pregnancy in DPO. What DPO test will show pregnancy Will the test show at 9 dpo

In the life of every married couple there is a moment when she decides that it is time for them to become parents. Of course, I want to know as early as possible that pregnancy has occurred.

For this, a special test is used at home. It is necessary to consider when this tool can show the exact result.

What is a pregnancy test, the rules for the use of such medical devices, from what day after ovulation it is done, every woman should know. This can help determine on which day of delay (and before) you can get a true result.

What is a device?

Any pregnancy test has the same principle of operation. Such devices contain a substance that is sensitive to the hCG hormone. How the research process takes place should be familiarized before using the presented tool.

Operating principle

Chorionic gonadotropin in the human body produces a fetal egg from the moment the process of implantation of a fertilized cell into the epithelium of the uterus has occurred. This happens a few days after ovulation.

Most often, the process of implantation occurs on the 7th day after ovulation. But it happens that this date is shifted. Then the implantation should be expected even 10-13 days after ovulation (DPO).

The growth of the hormone indicating pregnancy occurs every 24-48 hours. Its number is doubled. Therefore, even the most sensitive test can show a true result no earlier than 11 DPO.

The calculations take into account the features of the woman's cycle, how long it lasts, on what day ovulation occurs. This is the only way to calculate how long it takes to do the test.

The amount of hCG increases in the urine, and on the 11th day after fertilization it is captured only by a supersensitive pharmacy. However, this happens under ideal conditions. In fact, the features of the cycle should be considered before testing.

To accurately determine the onset of pregnancy, all test manufacturers recommend carrying out the procedure from the moment the menstruation is missed.

Susceptibility

There are 3 main types of drug sensitivity that allow you to determine pregnancy 2-3 days after a delay. In order for the device to be able to show a true answer already on the 11th day after conception, the accuracy of the medical device should be taken into account. Testers do with different sensitivities:

• 25 mIU/ml.
• 20 mIU/ml.
• 10 mIU/ml.

Each of them is able to show pregnancy when 2–2.5 weeks have passed with DPO. If the period is too short, it is necessary to use agents with a susceptibility of 10 mIU / ml. They are able even at 11 days after conception to catch the presence of hCG in the urine. But an error is possible.

If the active substance of the tester reacts to a hormone concentration of more than 25 mIU / ml, then even on the fourth day of delay, an erroneously negative result is possible.

On the 9th day after ovulation, even a test that reacts to 10 mIU / ml of hCG in the urine will not determine pregnancy. A woman cannot know when the moment of implantation of a fertilized cell will occur. Therefore, the test is done no earlier than on the 11th day after ovulation. In this case, only a means of increased susceptibility is used (10 mIU / ml).

However, all manufacturers still indicate that the earliest time when testing can be done is determined from the first day of the delay. Therefore, when wondering how long it takes to check for the presence of a hormone in the urine with DPO, one must still wait for the day of the expected menstruation.

Device types

When a woman decides to take an early pregnancy test, she is faced with a wide variety of pharmaceutical products. Their differences lie in the ease of use and the size of the error.

The period from which the device can show a true result depends on its susceptibility and error. Whichever tester is chosen, it is better if its sensitivity is 10 mIU / ml. There are different types of pharmaceutical products that allow you to determine pregnancy at an early stage:

1. Paper strips.
2. Inkjet and tablet tests.
3. Digital devices.

Paper strips are the cheapest, and therefore in demand. They can be used when the period after conception is 14-15 days. The error in this method is large. He can make mistakes more often than other varieties.

On the 11-12th day after ovulation, a tablet or jet type of device can be used. In the first case, a drop of urine is applied to the sensor with a pipette, and in the second case, the tip of the device is substituted under the jet. Such manipulations are convenient to do, even when you are not at home. When it is not possible to collect material for analysis in a jar in the morning, this option is ideal.

Most often, sensitive devices capture the concentration of the hormone at 10 mIU / ml. To minimize the measurement error, you should use an electronic device. He is even able to show the period of development of a new life in the belly of the expectant mother.

Even on the 12th day after conception, he will show the exact result. 4 days before the expected menstruation (not earlier than 11 DPO), a similar study can be carried out. If the result is positive, a “+” icon will appear on the screen, and a period will be indicated next to it, for example, 1-2 weeks. It should be noted that the device shows how long the development of the fetus lasts from the moment of conception.

How to do testing?

To increase the reliability of the analysis, it is necessary to strictly adhere to the manufacturer's instructions.

Checking should be done no earlier than 11 DPO. 3-4 days before the delay, only morning urine and a test with a sensitivity of 10 mIU / ml should be taken for research. In such urine, the concentration of the hormone is the highest. A few days after the delay, the timing of the test and the sensitivity of the test will no longer be as important.

Hands should be thoroughly washed and the collection container should be disinfected. If a cardboard strip is used, it must be immersed strictly to the designated level.

The result is evaluated no later than 5 minutes from the start of the study.

In any case, it is better to repeat the study after 2-3 days. If even a faint second strip is visible, you should consult a medical specialist. This will make it possible to accurately determine whether pregnancy has occurred or not.

Having become acquainted with the types and technology of using a home pregnancy tester, each woman has the opportunity to conduct a study on her own and get a reliable answer with a high degree of probability.

Research errors

When testing is carried out a few days before the next menstruation, you can get a false answer. Why it is better not to take a pregnancy test before a delay should be understood by every woman.

False positive response

Moreover, an incorrect positive result of the analysis is possible if a woman takes funds containing hCG or certain fertility drugs.

In the case where fetal development has recently been interrupted, the hCG level may not drop quickly. This also leads to a false positive result.

False negative response

But more often women still get the wrong negative answer. A false positive test tool can show if not enough time has elapsed since DPO.

After all, 11-12 days after ovulation and the alleged fertilization, the concentration of the hormone is not so high that it can be determined. There are a number of reasons why the meter may show an incorrect negative result:

1. Poor quality of the device reagent.
2. When there is a threat of termination of pregnancy.
3. Pathology of the kidneys or the cardiovascular system.
4. Ectopic development of pregnancy.
5. Testing is done before 10 DPO.
6. Instructions are not followed.
7. The study was conducted one hour after going to the toilet or drinking a lot of liquid.

Having incorrectly calculated how much time has passed since DPO, you can not determine the hormone in the urine. After 2-3 days, a second study is carried out.

A more accurate result before the delay of menstruation can provide a laboratory examination. In the blood, hCG is determined 1-2 days earlier than in the urine. In any case, only a gynecologist can confirm that a woman is expecting a baby after the examination.

In communities planning to replenish the family of women, the abbreviation DPO is often used. What is it during pregnancy? At what DPO can a rapid pregnancy test show a reliable result? What characteristic signs can appear from 7 to 14 DPO?

The second phase of the cycle, which begins after ovulation, is approximately the same for all women, so the release of the egg from the follicle is a convenient starting point for monitoring metamorphoses in the body.

DPO stands for “the day after ovulation”, and is used to determine the most favorable period for express diagnostics for pregnancy, to track the dynamics of changes in one’s own feelings.

At what DPO to take a pregnancy test

• The reagent in pregnancy tests works on the hCG hormone. The secretion of the latter begins the next day after the introduction of the embryo into the wall of the uterus - implantation. Implantation usually occurs between 7 and 10 DPO, but in about 10 percent of cases it can be a day or two earlier or later. If not enough time has passed since implantation, the test will be false negative. And vice versa: with early implantation, the result can be known much earlier than the day of delay.

• The level of hCG produced normally has a fairly wide range. The less the hormone is produced in the female body, the less it will enter the urine, and the more difficult the task will be for a home rapid pregnancy test.

• Sensitivity of pregnancy test. This indicator indicates the minimum amount of the hormone that the express test can respond to. Ultrasensitive tests are capable of diagnosing pregnancy when the hCG content in urine is 10 mIU / ml, which corresponds to 7-10 DPO. A pregnancy test with a sensitivity of 15 mIU/mL is unlikely to show a positive result before 12 DPO. Pregnancy tests with a sensitivity of 20 mIU / ml are intended for use from day 13 of DPO, with a sensitivity of 25 mIU / ml - from 14 DPO.
  In the first weeks after ovulation, a negative rapid test cannot be interpreted with absolute certainty as the absence of pregnancy, therefore, if a negative result is obtained, it is recommended to repeat the rapid test after a few days.

• Proper preparation for express diagnostics. In the early stages, to obtain a reliable result, it is recommended to use a more concentrated urine. The first urine in the morning is ideal, but urine that has been in the bladder for more than 4 hours can also be used. In order to avoid dilution of the urine on the eve of testing, do not consume large amounts of fluids, diuretic products or medications.

DPO signs of pregnancy

Doctors are often skeptical about the described signs of pregnancy before the delay, arguing that the changes in the body of the expectant mother during this period are insignificant and there are no pronounced symptoms. However, many future and already held mothers identify a number of signs by which they suspected pregnancy even before the delay in menstruation.

7-10 DPO: signs of pregnancy

• This is the standard period of implantation. May be accompanied by bloody brownish discharge with a tendency to decrease in profusion, pulling or tingling sensations in the lower abdomen, lumbar region, a feeling of warmth, burning in the uterus. Also, during implantation, chills, a slight increase in axillary temperature, and a sore throat can be observed.
• Metamorphoses can also occur with the breast: if a woman in a non-pregnant state in the second phase of the cycle had a breast, then this may not happen during pregnancy. And vice versa: many girls note an increase in the volume and sensitivity of the mammary glands that is uncharacteristic for them.
• Appetite during this period often increases - nausea of ​​pregnant women, if it occurs, then later, when the level of hCG rises significantly. Food preferences may change. Some women report a metallic taste when eating.
• In the rhythm of a woman's life, pregnancy also has its own adjustments: in some women, working capacity drops due to increased fatigue, a feeling of weakness, while in others, on the contrary, there is a surge of strength and energy. However, both of them are characterized by some absent-mindedness.

11-13 DPO: signs of pregnancy

• During this period, there may be an increase in the volume of the vaginal discharge, but the nature of the discharge should not be pathological.
• Swelling, a feeling of fullness and pulling pains in the lower abdomen persist, indigestion is possible.
• The mood is changeable, excessive emotionality is possible.
• The sense of smell is intensified.
• Frequent urge to urinate.

14 DPO: signs of pregnancy

• On this day, the most important signs of pregnancy are a missed period and a positive rapid test result.

Conclusion

The abbreviation DPO stands for pregnancy or planning, as “the day after ovulation” and is a convenient starting point during pregnancy planning.

It is impossible to say unequivocally what minimum DPO test will show pregnancy? With early implantation, which is very rare, and using the most sensitive rapid tests, a positive result is already possible at 7 DPO. In most cases, the cherished stripes appear at 14 DPO, give or take a couple of days.

Tests come with different sensitivities. 10 mIU / ml recognizes the pregnancy hormone (hCG) at a lower concentration. Such a test can determine pregnancy at an earlier date. Typically, most pregnancy tests have a sensitivity of 20-25 mIU/mL.

There are 4 types of pregnancy tests:

Test strips.

Attention! Spoiler!

(strip test)
It is necessary to lower the test strip for 10-20 seconds to a certain mark in a container with morning urine. The strip strip is impregnated with a reagent (antibodies to hCG). Morning urine contains the maximum amount of the pregnancy hormone (hCG). After that, put the strip on a horizontal surface and evaluate the result after a few minutes. If one red stripe - you are not pregnant, if two stripes - congratulations!

Attention! Spoiler!

(test cassettes)
This is most often the same test strip, but in a plastic tablet.

It does not need to be immersed in liquid. On the front side of the test are two windows. In the first window of a small box, you should drop a little urine with a pipette that is attached to the test, and the second (control) window will show you the result within a few minutes. Sensitivity and quality are the same as test strips, but the price is higher.

Attention! Spoiler!

State of the art tests.
The receiving end of the test just needs to be substituted under the stream of urine at any time of the day and after a few minutes - the result is ready, two strips or one. Inkjet tests are more expensive than tablet ones.

Attention! Spoiler!

In an electronic test, instead of a strip, the inscription “pregnant” appears if you are pregnant, and “not pregnant” if you are not pregnant. The electronic test is convenient because you do not need to break your eyes to see if there is a strip or not.
Electronic tests are the most expensive.

In what cases are there incorrect results?

False negative:

Attention! Spoiler!

1. if the test is done too early when the hCG level is very low
2. if the rules of the instructions are not followed and the test is carried out incorrectly
3. if you drink a lot of fluids, which can dilute the urine and reduce the concentration of the pregnancy hormone in it
if the test is overdue

False positive:

Attention! Spoiler!

1. in dysfunctional ovarian diseases
2. when the pregnancy hormone is produced by the tumor

Good to know:
Speaking about the fact that implantation usually occurs 7-10 days after ovulation, you need to know that sometimes early and late implantation occurs. The probability of implantation depending on DPO is presented in the list:
* 3-5 dpo - 0.68%
* 6 dpo - 1.39%
* 7 dpo - 5.56%
* 8 dpo - 18.06%
* 9 dpo - 36.81%
* 10 dpo - 27.78%
* 11 dpo - 6.94%
* 12 dpo - 2.78%
At the time of implantation, hCG is 2nmol, then 4nmol, 8nmol, 16nmol, 32nmol - and only in this case, when hCG exceeds 25nmol, the tests will show the second line of pregnancy !!! That is only 5 days. after implantation test will be positive...
Therefore, according to statistics, the test will only show at 14 DPO !!! Hcg in urine is lower than in blood.
From the moment of implantation, hCG increases exactly 2 times every day.

When to take a pregnancy test? -

A few decades ago, women found out about their pregnancy only 2-3 months after conception. And they were guided exclusively by general signs in the form of delays in menstruation or a sharp deterioration in well-being due to toxicosis. Today, it is much easier to find out about your “status”, because express tests for detecting pregnancy have appeared on the shelves of pharmacies. But how to use them correctly? How many days after ovulation should it be performed?

Show all

How does the test work?

So, a standard pregnancy test is a small cardboard strip with a special reagent applied to its surface. It reacts to the presence in the urine of chorionic gonadotropin - the so-called "pregnancy hormone". Why is it needed in the body? To regulate the physiological process of the synthesis of sex hormones. It is thanks to him that the corpus luteum, which remains in place of the ruptured folliculane, stops producing progesterone by the end of the menstrual cycle. That, in turn, is necessary to prepare the organs of the reproductive system (uterus, fallopian tubes, and in the future, the placenta) for bearing a child.

It is worth noting that human chorionic gonadotropin begins to be produced in the body almost immediately after the fertilization of the egg. That's why pregnancy tests can be used even before the moment when periodic menstrual bleeding should begin. So on what day after ovulation can you take a pregnancy test? The best option is 14-18, but this is a conditional recommendation, because it is not possible to accurately calculate the moment of release of a mature egg from the ovary, as well as the moment of its fertilization. The germ cell itself retains its ability to inseminate for 24-36 hours. That is, you should take into account the total error of about 2-3 days.



Possible reasons for an incorrect result

This scenario is also allowed. Like, the conception was successful, but the test strip indicates that the level of chorionic gonadotropin is critically low (in very small concentrations it is produced even without pregnancy). What is it connected with? With the fact that in such tests the reagent has a composition in which it reacts exclusively to a high level of gonadotropin. This is done intentionally by pharmacists in order to exclude cases when the test indicated a pregnancy, which in fact is not.

And there are also more modern methods for detecting a fertilized egg. We are talking about the so-called "jet" tests. The principle of their operation is similar to conventional paper strips, but the applied reagent is more sensitive. However, manufacturers openly indicate that such a tool has a high probability of a "false" result. And this can also be explained by the fact that the level of chorionic gonadotropin for each individual woman can vary dramatically.





HCG level norms

The concentration of chorionic gonadotropin in the blood is a purely individual parameter for each woman. According to data provided by the World Health Organization, its norm is:

• up to 15 units before pregnancy (after ovulation);
• from 25 units to 300 - at 1-2 weeks of pregnancy (average - 140-175);
• from 300 units to 5000 - at 2-3 weeks of pregnancy (on average - 1800-2200);
• from 5000 units ml to 30000 - at 3-4 weeks of pregnancy (on average - 18000-22000).



The level of hCG gradually increases up to 6-7 weeks of pregnancy, after which it stops. At the time of the birth of the baby, gonadotropin in the blood ranges from 4 to 18 thousand units per milliliter of blood.

Are there cases when hCG is kept at a critically low level throughout pregnancy, at which even testing cannot be carried out? This cannot happen physically, because if the concentration of the hormone is low, then the body automatically rejects the fertilized egg. In medical practice, this is referred to as "self-abortion of the fetus in early pregnancy." In such cases, consultations of a gynecologist and an endocrinologist are necessary. It is possible that the mechanism of hCG production is disrupted for some reason, which causes infertility.

And what can indicate a deviation from the norm of the level of hCG? When reduced, this is:

• violation of the functionality of the placenta (mainly occurs during the first pregnancy);
• the threat of spontaneous abortion;
• ectopic fixation of the fetus;
• frozen pregnancy.

But an increased level of the hormone may indicate:

• multiple pregnancy;
• malformations in the development of the fetus;
• genetic predisposition to a high concentration of sex hormones (is not a disease and does not require any specialized therapy).

And yet, as practice shows, a slightly increased level of chorionic gonadotropin will be significantly increased if a pregnant woman has been diagnosed with diabetes (it doesn’t matter what type). The number of units of hormones per milliliter of blood in this case can exceed the norm by almost 1.5 times. Because of this, doctors often overestimate the conditional week of pregnancy when compiling a medical record.





The most favorable days for an express test

It is believed that it is best to do a pregnancy test after ovulation as much as 16-18 days. Then the probability of a true result is about 99.7% due to the high concentration of hCG. At this moment, if the test shows pregnancy, then, most likely, the result will be confirmed already when examined by a gynecologist or after an ultrasound examination of the pelvic organs.



But on the 10th day after ovulation, the probability of a false result is approximately 60%. It is for this reason that tests recommend buying 2 pieces at once, and even from different manufacturers. It is better to opt for regular "paper strips" rather than inkjet tests. And we should not forget that in each of them the manufacturer necessarily places detailed instructions for use, where recommendations are indicated when exactly the check should be carried out.

And if already 3-4 days after DPO, the test showed pregnancy, is it worth trusting him? There is such a thing as conditional conception. This is when ovulation was normal, and a married couple at that time often made attempts to conceive a child, although in the end nothing happened (the probability of such an outcome is about 15%). Due to the fact that a high concentration of spermatozoa remains in the vaginal cavity for the next 3-7 days, the female body may respond inadequately to this by increasing the synthesis of gonadotropin. The increase in the concentration of the hormone will be insignificant, but this will be enough for the express test to respond to the biochemical change in the composition of the urine.

Therefore, it is virtually pointless to do a check after DPO for 3-10 days. With a probability of about 90%, the test will show the wrong result. It doesn't matter what kind of reaction you get.



Does time of day matter?

When to take a pregnancy test during the day: in the morning or in the evening? At what time will the result be more reliable? Doctors recommend that the test be carried out in the morning or at least in the first half (before lunch). At the same time, when possible, a few hours before the test, it is better to refrain from urinating and not drinking any drinks with a high sugar content.

And if after 5-10 minutes after waiting, the second strip is only slightly translucent, then this may indicate an early pregnancy. It should be remembered that it is almost impossible to accurately determine the period of ovulation. The only possible option to find out at home is to measure the basal temperature and draw up a detailed schedule of its changes over several months. But very rarely, women do this, monitoring only the duration of the menstrual cycle.



And it also happens that it doesn’t matter on what day after ovulation the test was carried out, but the result is still doubtful. What to do in such cases? The best option is to be examined by a gynecologist, take a blood test to determine the level of hCG, and then sign up for an ultrasound examination of the pelvic organs.

In what cases is a questionable result the norm?

In a certain situation, you should not rely on the test result, regardless of how long after ovulation the test was performed. This is due to the fact that the reagent that is applied to the test strips can give an incorrect result if there are substances in the urine that are not normal for a pregnant woman. Simply put, if its biochemical primary composition is violated. Against what background can this happen? This happens, for example, if a girl took some hormonal drugs in advance, or used contraceptives from the same category.

A similar situation will arise if the woman was still taking antibiotics. By the way, it is worth considering that they reduce the effect of taking contraceptives (almost any category). There is a huge array of those factors that can ultimately affect the result of a rapid pregnancy test. How different will the real result be from what the test strip shows? Such information should be obtained from the manufacturer of such products (or look for it directly in the instructions).



Also, the test result, which was done 10-18 days after ovulation, can be affected by various diseases of the reproductive system or the most banal inflammation of the appendages. If a woman feels unwell or feels unwell, but at the same time she also has a delay, then it is better to seek help from a gynecologist as soon as possible. Due to chronic diseases in early pregnancy, a real threat arises for the unborn baby. And then it’s better to do a comprehensive check of the body and take blood tests to detect infections and viruses (they are still, in fact, forced to pass when registering with gynecology).

In total, after ovulation, you should wait at least 10 days and only then carry out a pregnancy test. The ideal option is for 16-18 days, when the first few days of delay are conditionally determined. It is better to take the test itself several times with a break of 24-36 hours. And the final result of the analyzes is already voiced by the gynecologist on the basis of the studies. And it is not so important for which DPO test showed a positive result, because the main thing is the normal level of sex hormones, which confirms that the pregnancy is going well.