Negative hCG test at 13dpo. HCG levels by day from conception

All women planning a pregnancy know how exciting the two weeks after ovulation can be. They are especially hard on women who have been planning to get pregnant for a long time and for some reason their attempts have not yet been successful. Literally every day they look for the earliest symptoms and signs of a possible long-awaited pregnancy, almost a day after ovulation they begin to buy pharmacy tests in order to get at least a ghostly hope for a second strip. About when the tests should “strip”, we will tell in this article.

How does the second line appear?

All pregnancy tests, regardless of manufacturer and cost, work the same way. A special reagent applied to the strip is stained only when a sufficient amount of a hormone is found in the woman's urine, which is a faithful companion for bearing a child - human chorionic gonadotropin, which in various medical documents is abbreviated as FSHA, GPHa, LHA, TSHA, hCG or HCG.

This substance is often present in the analyzes of non-pregnant women, and even men, but in very small quantities. If the cherished event took place and the child is conceived, HCG begins to be produced more actively. It is produced by chorion cells. Gonadotropin is necessary for the female body in order for pregnancy to develop.

Under its influence, the corpus luteum, which is formed after ovulation, does not disappear, as happens in the absence of pregnancy before menstruation, but remains for the first few months. It assumes the function of the main endocrine organ for the developing embryo.

Under the influence of human chorionic gonadotropin the woman's immunity is somewhat weakened, which increases the chances of the embryo to survive. Otherwise, the strong and well-trained immunity of the mother would simply reject the baby, because it is half alien, since it contains the genetic material of the father.

The production of hCG in a woman’s body gives the command “to start” for the active production of progesterone, without which the preservation and bearing of a child will be impossible, as well as the female sex hormone estrogen, which is also extremely important during pregnancy.

Hormone level increases rapidly from the moment of implantation. A fertilized egg begins its journey into the uterine cavity within a few hours after meeting with the spermatozoon. She has to go through the fallopian tube, descend into the uterine space and gain a foothold in the wall of the main reproductive female organ.

This moment is called implantation. Sometimes a woman can guess about it herself - by slight pulling sensations in the lower abdomen, by a drop of smearing secretions on a daily pad. Implantation is usually done 6-10 days after fertilization. Most often - on the eighth day.

From this moment, the chorion starts the production of gonadotopin, and the amount of the hormone gradually increases, almost doubling every 48 hours. This does not mean that the substance can immediately be found in the blood or urine of a woman.

It takes a certain amount of time for the amount of HCG to exceed the sensitivity thresholds for pharmacy tests and laboratory reagents.

How do hormone levels increase?

In women, before pregnancy, the level of the hormone in the body does not exceed values in the range from 0 to 5 mU / ml. And in the urine, the substance is not detected at all. If conception has taken place, then for the first time the level of the hormone will exceed the “non-pregnant” threshold only on the second or third day after implantation. I must say that in all women the hormone is produced with different intensity, and therefore do not demand mathematical precision from laboratory assistants.

By the way, these difficult days from a moral point of view, ladies dreaming of motherhood, are called the abbreviation DPO, which means “the day after ovulation”. Ovulation, of course, is also not fixed for everyone, but in the vast majority of cases it falls on the 14-15th day of the cycle - in its very middle with a menstrual cycle duration of 28 days. Thus, 2 DPO is two days after ovulation or the 17th day of the cycle, and 5 DPO is the 20th day from the start of the menstrual cycle and only the fifth day after the expected ovulation.

If the fate is that the second phase of the female cycle lasts 14 days, then The first day of the delay is 14 DPO or the 29th day of the cycle. Many women, in anticipation of good news, start testing too early and are very worried about the lack of the coveted second strip. After how many days after conception you can already safely do an hCG test, it becomes clear if you know how the quantitative indicator of a hormonal substance in the blood changes.

Table of average quantitative values of HCG in the blood during pregnancy:

Time since ovulation	Average concentration of HCG	Lowest HCG value	Highest HCG value








15 DPO (beginning of delay)












28 DPO (two weeks late)

Test sensitivity

The gonadotrope produced from the moment of attachment of the fetal egg first enters the bloodstream, and only then part of it is excreted in the urine. Therefore, at the initial stage, even before the onset of a delay, only a biochemical blood test can show the “piquant position”.

The tests, which are available at any pharmacy or store, also differ in their sensitivity, in their ability to "capture" traces of the hormone in the excreted fluid. The minimum is 30 units, the maximum is 10. Most often, test strips with an average sensitivity of 20-25 mU / ml are found on the shelves of pharmacies. They are able to respond with a control strip to an increase in the chorionic gonadotropin only 14-15 days after conception. That is why they are recommended to be carried out in the first days of the actual delay that has already occurred, so that the results are not in doubt.

If ovulation occurred on time and implantation was not delayed, then the analysis will give informative first results at least 10-11 days after fertilization.

Of course, it happens that the test begins to show a weak second line even earlier, but this becomes possible only in women with hCG production at the maximum level or above the average norm. There is only one conclusion from all of the above - if about as soon as possible, you should go to the nearest clinic to donate blood for the determination of hCG.

If “time suffers”, then the woman should also be patient, not be nervous and wait for a delay in order to conduct a simple and understandable home test, which with a high degree of probability will be able to answer the main question 2 weeks after conception.

Growth by week

Chorionic gonadotropin does not always grow at the same rate as in the first days of pregnancy. At first, it doubles every 48 hours, as soon as the concentration of the substance in the blood exceeds 1200 mU / ml, the growth of the hormone will slow down somewhat - it will begin to increase every 72 hours. When the concentration reaches 6000 mU / ml, growth will become even slower - the quantity will change every 96 hours.

The amount of the pregnancy hormone reaches its maximum by the 10-11th week of pregnancy, after which it begins to decrease at a slow pace. When the pregnancy is multiple, and the expectant mother bears two or three children, the level of the hormone in her blood and urine will be two or three times higher than normal (the chorion of each of the babies produces its own "hormonal accompaniment", hence the inflated numbers).

Possible problems

In trying to figure out the values of hCG, many women are faced with a lot of questions and problems, the answers to which are not so easy to find. Among the abundance of information on the Internet, there are few specific indications of the causes of certain ambiguities associated with the “pregnancy hormone”. We have tried to bring together and answer the most common questions related to the definition of "interesting position" at the very beginning.

How to do the analysis correctly?

Before a visit to the treatment room or laboratory, it is advisable to stop eating fatty foods 12 hours in advance. The study is carried out by a biochemical method, so the abundance of fats can affect its effectiveness. Blood from a vein is taken on an empty stomach. The result can be obtained in a few hours or a day, it all depends on the work of a particular laboratory.

Before conducting a home test, prepare a clean, dry container to collect urine. No dietary restrictions required. It is best to do a morning urine test, because it is considered the most concentrated. However, many pregnant women refer to the fact that they have brighter and clearer second stripes appearing in evening urine. It all depends not so much on the time of day, but on the time elapsed between urination. Before testing, make sure that at least 5 hours have passed since the last trip to the toilet.

Before testing, make sure that at least 5 hours have passed since the last trip to the toilet.

The result does not match any existing table

This really happens often, and this is not at all a reason to worry. The fact is that different laboratories use different reagents and auxiliary technologies for conducting a biochemical blood test. Hence the difference in final scores. When picking up a ready-made analysis, do not forget to ask to show the hCG norms for this particular laboratory so that you have something to compare your results with. And it is best to get an internal appointment with an obstetrician-gynecologist, which will be able to correctly decrypt the data from the laboratory.

Level reduced

Below normal, the level of the substance produced by the chorion may be in women who have experienced late ovulation. The lady herself believes that 14 days have passed since ovulation and is waiting for at least 105 mU / ml in the conclusion of the laboratory assistant. But the result is 64 or 80. The woman falls into a stupor and begins to look for the causes of "malfunctions". In fact, she does not even realize that her ovulation was "late" for a couple of days, which led to a later implantation of blastocytes in the uterine wall.

The value of the chorionic hormone may be reduced in women with an existing threat of spontaneous abortion. On the one hand, the threat reduces the level of production of such an important hormone, and on the other hand, the threat is aggravated against the background of hCG deficiency. In this situation, doctors will help, because they can offer a woman supportive hormonal therapy, which will restore the balance of necessary substances and give the baby a chance.

Above normal level

An overestimated level of the hormonal substance produced by the chorion may turn out to be when early ovulation has occurred. This is also quite real, and then the embryonic period will in fact differ from that which the woman herself assumes by several days. Thus, the blood test will show higher results than expected, and this will be quite justified, because the implantation occurred earlier.

Increased hormonal levels may turn out to be if a woman becomes pregnant with twins or triplets. But only ultrasound diagnostics can answer this question and not earlier than at 6-7 weeks of pregnancy, when it will be possible to view the number of embryos on the scanner monitor. In the meantime, a woman will need to repeat a blood test several times to get a picture in dynamics - an increase in the concentration of the hormone during multiple pregnancy will be uniform, although increased according to all standards.

The test is negative, but the blood test is positive

In this case, most likely, there is a pregnancy. It's just that its period is still so short that the concentration of the hormone in the urine (and it is half the concentration in the blood) is not captured by the reagents of the strip (less than 15-20 mU / ml). A simple home urine test should be repeated after a few days.

Home test is positive but blood test is negative

Most likely not pregnant. The test may turn out to be corny defective, and this phenomenon is common. It may be carried out in error. Sometimes, for a positive result, a woman who really wants a child takes the so-called "ghost" of the strip - a weak and barely distinguishable second strip of a grayish color. This optical phenomenon in most cases is the designation of the place of application of the reagent, which becomes somewhat gray after the strip dries. The “ghost” cannot talk about pregnancy.

If it is confirmed in the laboratory that the level of the hormone in the blood does not indicate the onset of an “interesting situation”, then it is worth trusting a more accurate method - the laboratory one.

The analysis was positive, and then became negative

In women who are not puzzled by measuring the level of hormones in the second phase of their cycle, there are sometimes delays of several days. After which the menses come, albeit more abundant than usual. Nobody pays attention to it. A woman who will do her best to monitor her condition before the delay, including taking tests before it, in this situation can get a very strange result - positive, indicating several days of pregnancy, but after a week, tests can give negative results.

If the blood at 11 DPO showed the presence of pregnancy, and menstruation, albeit late, still came, most likely, there was a rejection of the fetal egg from the wall of the uterus. This can happen for various reasons. Most often, at the root of the problem are genetic defects and anomalies, irreparable mistakes of nature during fertilization. Such an embryo is not able to grow at a normal rate and is rejected.

Why send for analysis?

Sometimes a doctor gives a referral for a blood test to determine the level of hCG. He does this not always and not for everyone. This usually happens at the reception, where a woman comes with complaints about a delay in menstruation. It is practically impossible to establish the fact of pregnancy after 10 days of delay by any other means., and therefore the doctor can send the lady home and ask to come later or issue a referral to the laboratory.

He will do this if you need to know for sure right now whether the pregnancy has occurred. This may be required if an in vitro fertilization (IVF) procedure was performed, if the lady had previously had miscarriages and missed pregnancies in the very early stages of gestation, if she had recently had an ectopic pregnancy or had an abortion.

The level of the gonadotropin hormone allows not only to judge the fact of pregnancy and presumably determine its duration, but also to track how the embryo grows and develops in the period before it can be seen on ultrasound.

If hCG is growing at a good pace, and analyzes made with a difference of 5-6 days confirm this, then there is nothing to worry about. If the growth of the hormone has slowed down or stopped, if it has begun to decrease, the doctor may suspect a frozen or ectopic pregnancy, which requires prompt surgical intervention to save the woman's life.

In the next video, experts will tell you about what hCG or human chorionic gonadotropin is.

Pregnancy test
When and how to submit
Days from conception

HCG according to DPO (human chorionic gonadotropin on the days of ovulation) is considered a special type of female hormone, which is overestimated not only during pregnancy, but also in everyday life. An analysis for this hormone is done in the first trimester of pregnancy.

Analysis for hCG according to DPO

Particular attention is paid to this hormone from the first weeks of fetal development, and there are even accepted norms for such an indicator.

It should be noted that the indicators of a pregnant woman may not differ in any way from those of a non-pregnant woman. When obtaining results on hCG, it is necessary to rely on the standards established in the laboratory in which the analysis was performed.

Human chorionic gonadotropin is a hormone that is secreted by the chorion after the attachment of a fertilized egg to the wall of the uterus.

It is released almost from the moment of conception, therefore this indicator is considered reliable during the period of diagnosing pregnancy. But only on condition that the diagnostic results are reliable.

Gynecologists monitor this indicator in the 1st, 2nd and 3rd trimesters of pregnancy, as this is necessary in order to track whether the development of the embryo is proceeding correctly.

The composition of human chorionic gonadotropin includes alpha and beta particles. Of these, beta is considered unique, and therefore it is monitored so carefully throughout pregnancy. To find out whether conception has occurred or not, an analysis can be carried out if there is a 2-3 week delay.

Since 10 days have passed since conception, it means that the indicator will be overestimated. For an accurate result, an additional ultrasound examination is performed.
Everyone is well aware of home express pregnancy tests. But in the urine, the content of this hormone is half that in the blood, which is why such a diagnosis is inferior to a laboratory study, which will show a more accurate result.

After the analysis is received for its decryption, it is necessary to adhere to the following rules:

Basically, in all laboratories, the period is set from the last date of menstruation, and not from conception.
After you have been handed over the analysis, you need to find out the norms of hCG in this laboratory, since in different places the indicators may not match.
If the level of hCG differs from the established norm, then there is no need to panic. It is best to establish the dynamics of the analyzes, for this, retake the analysis after 4 days.
If there is a suspicion of an ectopic pregnancy, then it is imperative to undergo an ultrasound examination to clarify the diagnosis.

Norms of the level of human chorionic gonadotropin

After the process of fertilization of the egg, the active release of gonadotropin begins. In the first trimester of pregnancy, its value reaches 2 times the norm, this is due to the fact that every 2 days its rate increases. When the 7th week of pregnancy comes, this indicator is at its peak, and then does not change until the 2nd trimester. It is according to this indicator that doctors conclude whether the pregnancy is proceeding normally or not.

At 14 and 18 weeks, the indicator of such a hormone can signal the development of a pathological process. Therefore, they can re-assign such an analysis for safety net. Usually women are prescribed hCG at 9 DPO, hCG at 11 DPO, hCG at 14 DPO.

We can say that this is a relative indicator and each laboratory has its own. Approximate values of such an indicator are as follows:

8 DPO - 17-134 mIU / ml;
10 DPO - 17-147 mIU / ml;
12 DPO - 24-199 mIU / ml;
13 DPO - 29-213 mIU / ml;
14 DPO - 33-223 mIU / ml;
15 DPO - 33-429 mIU / ml;
16 DPO - 70-758 mIU / ml;
17 DPO - 111-514 mIU / ml;
18 DPO - 135-1690 mIU / ml;
19 DPO - 324-4130 mIU / ml;
20 DPO - 385-3279 mIU / ml;
21 DPO - 506-4660 mIU / ml.

If your indicator is above or below the norm, this is not always a reason to panic. After all, such data may indicate the development of pathologies or the onset of serious problems in a woman's body. The main thing, before you panic, you need to clarify that the gestational age is set correctly.

Too high an indicator indicates the development of multiple pregnancy, usually the level of the hormone in the blood increases in proportion to the number of embryos. This means the presence of problems such as toxicosis, preeclampsia, fetal abnormalities, and prolonged pregnancy. We must not forget that there will be an increased value if the expectant mother suffers from diabetes or takes synthetic progestogens.

There is also such a thing as a false positive result. If, according to the results of the study, it turns out that the woman is not pregnant, and the hCG level is high, then one of the following factors influenced its value:

If a woman was taking hormonal drugs, including birth control pills.
Residual after an abortion or a previous pregnancy.
Bubble drift.
The development of tumors of the ovaries, uterus, kidneys and lungs.

A lowered indicator indicates an ectopic pregnancy, a threat of miscarriage or overcarriage of the fetus. Such a reduced rate also occurs during placental insufficiency.

Human chorionic gonadotropin during a missed pregnancy also has low rates. At this point, the hormone is not produced, and it falls. Usually, to diagnose such a condition, the doctor conducts several types of tests in a row, and then draws a conclusion based on them.

Sometimes the indicator goes beyond the limits as a result of the fact that the gestational age was set incorrectly. That is why the doctors send the patient for an ultrasound examination for clarification, where they make the final conclusion.

But there are times when the fetus froze, and the rate of such a hormone grows. A negative value of this hormone can also be established; in such a situation, the analysis is repeated.

Rules for passing the analysis

In order for the analysis to show an accurate result, it must be passed correctly. How to prepare for it, you should be instructed by the local gynecologist. But know one rule: the analysis is given strictly on an empty stomach. It is mainly done in the morning, sometimes another time of day is chosen, but it is necessary that the patient does not eat for 6 hours.

The laboratory assistant will take blood for analysis from a vein. Try to eliminate all physical activity during the day. If you are taking hormonal drugs, the result will be inaccurate, warn the laboratory worker about this, where blood sampling should take place.

Even if the result of the analysis alarms you, then do not panic and do not draw negative conclusions, because only your gynecologist can make the correct decoding.

Why is such an analysis important?

This analysis is done for the following reasons:

With it, you can understand on the 6th day after conception whether pregnancy has occurred or not. Of course, such a quick determination is alarming, but it is much more reliable than home rapid tests.
Such a test is important in order to accurately determine the gestational age. It happens that a woman cannot exactly name the date of conception or the last menstruation.
However, this indicator reflects the degree of development of the fetus, and whether there are pathologies.
The level of hCG shows the correct development of the fetus.
If there was an increase in the level of the hormone, then this may mean the development of multiple pregnancy, preeclampsia, or diabetes mellitus.
It is also impossible to exclude the option that thanks to him it is possible to determine such a disease in an unborn baby as Down syndrome.
A low level of hCG means the development of an ectopic or missed pregnancy.

Each laboratory sets its own standards for human chorionic gonadotropin. Therefore, the analysis must be taken at the place where the gynecologist will send you.

Thirteenth day after ovulation (13 DPO) and the test is negative? You should not unequivocally assume that “it didn’t work out again”, and get upset in advance. At such a short time, not all tests to determine the concentration of the hCG hormone in the urine will show an accurate result.

From what day to count the delay of menstruation?

Many mistakes in the early diagnosis of pregnancy occur only because women do not know how to calculate the menstrual cycle. Be sure to have a special calendar. In it, regularly mark the days when menstruation begins and ends. A few months of work with a regular paper calendar or a special smartphone application will allow you to study the features of your menstrual cycle well. This is important for determining the moment of ovulation and delay.

The duration of a normal cycle is on average 28-30 days. Periodicity is an individual indicator. Therefore, for every woman, menstruation can be both short (3 days) and long (7 days).

Menstruation may begin a little earlier or later, and this is not a cause for concern. The moment of the onset of menstruation directly depends on external and internal factors: hormonal failure, stress, climate change or time zones, malnutrition, women's diseases and, of course, pregnancy.

To understand whether this is a delay, or the cycle has been rebuilt a little, you need to refer to the calendar. It marks the end date of the last menstruation. From this day you need to count the usual duration of the cycle. For women with irregular periods, another option has been developed. Here the longest and shortest cycles are added up, and then the resulting figure is divided by two. For accuracy, you can calculate the arithmetic mean of the last three to six menstrual cycles. By the way, all this is done independently by a mobile application.

In the same way, the day of ovulation is determined. However, with an irregular cycle, it will be more difficult to understand this issue. If the number of days between periods is approximately the same, then it is enough to subtract 12-14 days from this figure. This will be the approximate day of ovulation. Sometimes the release of the egg from the follicle can occur closer to the end of the last menstruation or to the beginning of the next. With an irregular cycle, ovulation can only be determined with the help of special tests.

Why you should not believe the results before the delay?

When will the test show pregnancy, if any? Most special strips can be used from the first day of delay. However, you should be aware that there may be a negative test at 13 DPO. This is not surprising, since with a cycle of 28 days, it falls just on the last one. That is, in fact, there is no delay yet. The concentration of hCG might not yet have reached the required minimum for the test to “react” to it.

The strips have a sensitivity of 20-25 mIU/ml. Before the delay, only expensive and high-quality pregnancy tests can recognize an interesting situation. Already seven to ten days after the intended conception, strips with a sensitivity of 10 mIU / ml can determine whether a woman will become a mother in the next nine months.

Will a test show pregnancy on the 13th day after ovulation (DPO)? After all, almost two weeks have passed, and it seems that this time is enough to determine an interesting situation. In fact, this is a very short period of time. When there is no delay in menstruation (including at 13 DPO), a negative test should not be taken seriously. To get a reliable result, it is better to wait a few more days.

Pregnancy tests for home use respond to the hormone hCG, which begins to be produced only after the embryo has attached. Implantation in 18% of cases occurs at 8 DPO, in 36% - at the ninth, and in 27% - at the tenth. On the remaining days from 3 to 12 after ovulation, the probability of implantation is less than 10%. After attachment, the fetal egg should begin to produce hCG - a specific pregnancy hormone (chorionic gonadotropin). In order for the test to accurately determine pregnancy, the hCG level must reach at least 20 mIU / ml.

"Ghost" strip

A negative test at 13 DPO can also occur during pregnancy. It’s just that the level of the hCG hormone is still insufficient for the reagent to react and clearly show the second strip. But at the same time, some women see a pale line on the tests. This result cannot be considered reliable either. The test should be repeated in a couple of days.

The stripe "ghost" is also called the evaporation line, when the colored trace was, but after a while it became completely invisible. The "Phantom" has the same width and length as the control sample. It is painted in blue, pink or lilac, but is more pale, barely noticeable. Somehow the "ghost" resembles a smoky trail where there should be a brightly colored second stripe.

Negative test at 13 DPO: is there any hope?

Since there is no delay on this day, such a result does not mean that there is no pregnancy. Of course, it's hard not to worry when there have already been several unsuccessful attempts to conceive a child. However, you will have to wait. In order to worry less, it is recommended to be distracted. The results of numerous studies prove that a woman who experiences stress, the chances of successful conception are reduced by 12%.

In the first two weeks after implantation, the hCG level doubles every 1-2 days. If the fetal egg entered the uterine cavity on the fourth day after ovulation, then at 13 DPO the hCG level will be only 2 mIU / l. At 5 DPO, this figure will increase to 4, at the sixth to 8, at the seventh to 16, and at the eighth to 32. An ultrasensitive test will show pregnancy a week after ovulation. Normal - on the eighth day. But this is only if the woman knows exactly the day of ovulation, having determined it not by the schedule or tests, but by ultrasound. After all, the probability of attachment to the third - fifth DPO is only 0.68%. Yes, and the fetal egg can produce hCG at different rates.

If we take the average data, everything will go even slower. For example, implantation occurred on the eighth day after conception, and hCG increases 2 times every two days. Therefore, at 9 DPO, the hormone concentration will be only 2 mIU / ml, at 11 DPO - 4, at 13 DPO - 8, and at 15 DPO - 16. On the first day of the delay, even a qualitative sensitive test will show only a weak second strip. But on the third day it will be possible to admire a bright and clear line.

It happens that pregnancy develops even more slowly. It's quite normal. Conception at 10 DPO occurs in 27% of cases. Then hCG "grows" to 16 mIU / ml only on the third day of the delay, or at 17 DPO.

How else can you find out if you're pregnant?

When will the test show pregnancy? It is possible to reliably find out whether an interesting situation caused the delay only on the third or fifth day of the delay. By this time, the level of hCG will reach the required minimum, even if implantation occurs late, and the embryo is in no hurry to synthesize the hormone. If you are impatient to find out if there is a pregnancy, you can do a blood test to detect hCG in the clinic. Blood is taken from a vein in the morning on an empty stomach. The laboratory will also determine the exact gestational age.

Medical support

For certain diseases or unsuccessful attempts to get pregnant, the doctor may prescribe a medication. For example, Duphaston. And at 13 DPO, the test was negative. Cancel "Dufaston" in this case or not? Before making a decision, the doctor will send you to the laboratory for a blood test. Further actions will depend on its result. If the pregnancy is confirmed, then Duphaston is usually not canceled for some time. If conception did not take place in this cycle, then the medication should be discarded.

HCG doubling period in singleton pregnancy

HCG begins to be produced as early as 6-10 days after the fertilization of the egg. In the first weeks, the hCG level should double approximately every 2 days. As the gestational age increases, its growth rate slows down - when the level of 1200 mU / ml is reached, hCG doubles every 3-4 days (from 72 to 96 hours), and after 6000 mU / ml, doubling occurs on average every 4 days (96 hours).

PM - by the date of the last menstruation.
DPO - days after ovulation.

The concentration of hCG reaches a maximum at 9-11 weeks of pregnancy, then the level of hCG begins to slowly decrease.

With multiple pregnancies, the content of hCG increases in proportion to the number of fetuses and, on average, hCG levels in pregnant women with twins (triplets) are usually higher than in other pregnant women at the same time.

Laboratory standards and user results

The norms of hCG in different laboratories may vary. This is due to the use of various research methods, reagents and other factors. Therefore, in order to correctly assess the growth dynamics of the hormone, it is necessary to conduct studies in one laboratory and evaluate the results relative to the norms of this laboratory. The hCG calculator allows you to evaluate your results relative to the norms of different laboratories:

The results of other users on the graph may also differ (depending on the standards of laboratories), contain errors (for example, incorrectly entered data).