What is HCG?When to do a blood test, a test for hCG?

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Dynamics of development of pregnancy according to the results of analyzes on hCG.

Contents of

  • What is HCG?When to do the test?
  • HCG blood test - transcript: table
  • HCG norm on days from conception
  • How hCG grows during pregnancy
  • hCG in frozen pregnancy
  • hCG in ectopic pregnancy
  • hCG daily in case of double
  • hCG after ovulation
  • hCG after IVF
  • Video: analysisblood on HCG
  • Our medicine requires patients to take a lot of different tests to determine the health or ill health
  • Several decades ago, we were surprised at the ability of doctors to immediately talk about the absence /
  • Now with the development of Internet resources, access to the study of material associated with the appointment and interpretation of a variety of tests and analyzes is open
  • We can in detail or superficially read it and ask questions to doctors. Although they do not like the last moment, and sometimes it irritates

. What is HCG?When to do the test?

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laboratory worker is studying blood on hCG
Human chorionic gonadotropin, or abbreviated as hCG, is a specific hormone that is produced in the body in the presence of abnormal growth of the cells of the reproductive system.
The most common use of it is to determine the fact and duration of pregnancy. Women are also tested for the amount of hCG:
  • for understanding how the baby develops in the womb of
  • in case of suspected
  • tumors to assess the quality of the artificially aborted
  • in the presence of threatening miscarriage.
Men are assigned an analysis to determine the absence / presence of testicular tumors.
hCG consists of 2 elements:
  • alpha particles
  • beta particles
By the number of beta-hCG in the blood in the laboratory, the presence of pregnancy is established or vice versa - its absence.
When a woman is in an interesting position, then the production of hCG is responsible for the chorion - the envelope of the fetus. It regulates the growth and development of the future baby in the body of the mother until the placenta is formed, which these functions will take over.
Chorionic gonadotropin also regulates the hormonal background of a pregnant woman. It controls and stimulates:
  • Progesterone hormone production, estrogen
  • Yellow body work in the ovaries
  • Normal development of the baby in the womb in the womb in the first trimester
Nausea, which plagues many women at the beginning of pregnancy, is manifested due to an increase in the concentration of hCG in the body.
Chorionic gonadotropin is already detected in the blood through:
  • a week after the fertilization of
  • a couple of days after the delay of the monthly
In the urine, it manifests a couple of days later.
It should be noted that all pharmacy tests for pregnancy show an increased concentration of hCG or lack thereof.

Blood test for hCG - interpretation: table

a girl performs a blood test for hCG level
  • If you were prescribed to donate blood to HCG, then do it in the morning on an empty stomach
  • The unit of hCG change is mIU / ml - milI international unit per mililitr. In the body of non-pregnant women, the index of chorionic gonadotropin ranges from 0 to 5 mIU / ml
  • . Since the attachment of the fetal egg to the uterine wall, the female body begins to increase the production of the chorionic gonadotropin. On average, its number doubles every day or three.
  • This trend persists until the 9-11 weeks of pregnancy. Then the indicator is reduced and fixed at a specific level
Approximately the dynamics of changes in the amount of hCG in the body of a pregnant woman is as follows:
HCG rates for weeks. Table
Indicator( from date of last menstruation) Minimum Maximum
Non-pregnant women 0 5.2
Pregnancy
3 - 4 weeks. 15 157
4 - 5 weeks. 102 4871
5 - 6 weeks. 1111 31502
6 - 7 weeks. 2561 82302
7 - 8 weeks. 23101 151002
8 - 9 weeks. 27301 233002
9 - 13 weeks. 20901 291002
13 - 18 weeks. 6141 103002
18 - 23 weeks. 4721 80102
23 - 41 weeks. 2701 78102
Note that the work of the organism of each particular woman is very individual, so check the results with the specialist who is watching you.

HCG norm on days from conception

blood in syringe for hCG analysis
  • Each laboratory has its own standards and norms for decoding the tests, including HCG in the blood
  • On the other hand, due to the difference in the calculation of the gestational age, there may also be differences in theobtained results of the concentration of chorionic gonadotropin
  • Obstetric period is always more embryonic, since it is counted from the first day of the last menstruation
HCG norm on days from conception. Table
The date after conception( ovulation), days Min. Max.
7 2 11
8 3 19
9 5 22
10 8 27
11 10 46
12 16 66
13 21 106
14 28 171
15 38 271
16 67 401
17 121 581
18 221 841
19 371 1301
20 521 2001
21 751 3101
22 1051 4901
23 1401 6201
24 1831 7801
25
2401 9801
26 4201 15601
27 5401 19501
28 7101 27301
29 8801 33001
30 10501 40001
31 11501 60001
32 12801 63001
33 14001 68001
34 15501 70001
35 17001 74001
36 19001 78001
37 20501 83001
38 22001 87001
39 23001 93001
40 25001 108001
41 26501 117001
42 28001 128001

How the hCG grows during pregnancy

, the doctor records the result of the hCG analysis on the
  • Chorionic gonadotropin protects the fetus from attacks of the mother's body. The latter in the first days and weeks perceives the first as a foreign body and tries to get rid of it, push out
  • Because HCG affects the areas of the brain that depress the immune system of the pregnant woman. At the same time, this hormone takes control of the production of those substances that the embryo needs for the successful development and life of
  • . Such a responsible mission of hCG is accompanied by its doubling every one and a half - two days after 5-7 days after conception. The dynamics of doubling persists up to 10-11 weeks of pregnancy. After the rate decreases to a certain point and remains until the end of pregnancy
From the tables above, it is clearly visible in the numerical values ​​of the change in the concentration of chorionic gonadotropin.

hCG in the case of a dead pregnancy

a girl is upset by the results of tests on hCG
  • Pregnancy fading occurs more often in the first trimester, rarely at later periods
  • Because the fetal egg remains attached to the uterine wall for some time, hCG is produced. Its concentration increases slightly until the embryo detachment and its release

hCG in the ectopic pregnancy

in the girl take blood on the hCG in the laboratory
  • The embryo envelope in the ectopic pregnancy produces the hormone gonadotropin in a much smaller amount than with the normal location in the uterus
  • Doubling dynamics every 2-3 days you will not see. Nevertheless, the increase in the level of hCG persists, only at a much slower rate of
  • . Occasionally, an increase in the concentration of the chorionic gonadotropin has a negative tendency. That is, instead of growth, there is a clear slight decrease in

hCG by day in the case of a double

snapshot of a twin on ultrasound
  • . Do you hold the results of the analysis on hCG and see that the indices oscillate around 5 mIU / ml? So, the pregnancy has not yet occurred or you hurried with the research of
  • . If you compare the dynamics of the chorionic gonadotropin change with the table of its increase and see that for a particular week your data is more than twice, the probability of multiple pregnancy
  • is high. Due to HCG data you can be diagnosed with a doublemuch earlier than the US-
  • analysis. Approximate figures for the change in the amount of hCG in the blood in multiple pregnancy, see the table below. The starting point is selected first day of the last menstrual period
Table
Days Mean Range
28 64.7 9.5 -120
33 1,500 200 - 1.800
36 19.200 2.400 - 36.000
40 58.344 8.700 - 108.000
45 126.000 72.000 - 180.000 414.000
70 348.000 -480,000

hCG after ovulation

in pregnant women take blood for analysis of hCG
  • On the third day after ovulation fertilization of the oocyte takes place. From this moment, the envelope of the fetal egg begins to produce chorionic gonadotropin, gradually increasing its concentration in the body of the woman.
  • Pharmacy pregnancy tests can "feel" hCG in the urine when it is equal to or greater than 25 mIU / ml. That is, approximately 13-14 days after ovulation, or after 2-3 days of delaying menstruation. In this case, the pharmacy test will show you a weak second stripe of the
  • . In turn, a blood test for HCG will give a more reliable result, since it is able to catch a pregnancy hormone in a concentration of 5 mIU / ml. Therefore, the first time you can give blood, you can a week after ovulation and repeat the procedure after 2-3 days

hCG after IVF

a girl after IVF hopes for pregnancy
If, during a natural pregnancy, it is enough to pass several tests for HCG, then after ECO regular monitoring of the concentration of chorionic gonadotropin is the key to the success of the procedure and a good development of pregnancy.
To implement IVF doctors use embryos:
  • three-day
  • five-day
  1. Therefore, the amount of hCG in the body of a pregnant woman is slightly different. For example, after the implantation of a three-day embryo, the pregnancy hormone has slightly higher values ​​than the five-day
  2. . The tables of norms and ranges of hCG values ​​after embryo transfer by the IVF method are easily found in the Runet open spaces, as well as in the doctor who performed the procedure
  3. . If you successfully completed the IVF procedure, be ready for the first two weeks to constantly monitor your condition. Once the level of the chorionic gonadotropin reaches 100 mIU / ml, you can be congratulated on the pregnancy

Video: a blood test for hCG

  • Apr 20, 2018
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