To these hormones is also the chorionic gonadotropin - in the analysis sheet it is usually designated by the abbreviation HCG. So hCG during pregnancy is one of those informative indicators by which experts have the opportunity to suspect any abnormalities in the development of pregnancy or, by monitoring the level of the chorionic gonadotropin, to confirm the norm. In addition, it is HCG that becomes the substance that stains the strip of a home pregnancy test: as early as 6-8 days, chorionic gonadotropin is present in the urine. All because he is intensively beginning to develop the tissue of the embryo, or rather - the chorion, which in the future will turn into a placenta. But in blood, the level of hCG during pregnancy is much higher than in urine, and therefore tests to determine the chorionic gonadotropin in the body of a pregnant woman are conducted just in the study of blood samples.
Chronic HGF Test
Chorionic gonadotropin consists of two particles: alpha and beta, and it is the beta particle that becomes the "informer" that helps doctors in tracking the dynamics of pregnancy. Normally hCG during pregnancy begins to be developed immediately after implantation of a fertilized egg into the uterus and attaching there to its wall. In the early stages of pregnancy, the hCG level rises rapidly, doubling every two to three days. The maximum concentration in the blood of a pregnant woman is observed at 7-10 weeks, after which the level of hCG begins to gradually decrease and its indices remain the same almost before delivery.
The test for hCG during pregnancy allows early on to determine some of the threats to pregnancy, deviations in its normal development and the development of fetal development. Or, on the contrary, exclude the fears of a future mother in this regard. An analysis of the chorionic gonadotropin can also tell how many children live with the mother in the tummy: in case of multiple pregnancies, the level of hCG is much higher, and it increases in proportion to the number of fruits.
An increased level of hCG during pregnancy can also speak of very dangerous conditions. So, for example, the concentration of this hormone increases due to early toxicosis, due to endocrine disruption in the mother, possible cancer. In addition, almost twice the level of hCG laid down the norm in the presence of chromosomal pathologies in the fetus.
But the reduced level of hCG during pregnancy, as well as the insufficient dynamics of its growth, can be a sign of an ectopic pregnancy. Also, significantly lower concentrations of the hormone are recorded when there is a threat of miscarriage, with a stiff pregnancy, with placental insufficiency.
To analyze the hCG during pregnancy was the most reliable, they give it in the morning, on an empty stomach. If, for some reason, the blood was not taken for a trial in the morning and the analysis is performed at another time, then six hours before taking blood, it is advised not to take any food. If hormonal drugs are used (even in the recent past), the nurse must be informed. Also on the eve of going to the doctor for the analysis of the chorionic gonadotropin will have to exclude physical activityHow is hCG determined and what are its norms?
The first blood test for the concentration of hCG is given 12 days after conception or 3-5 days after the delay of the menstrual period. This is the so-called "defining" test: elevated levels of chorionic gonadotropin indicate the onset of pregnancy. However, at this stage, hCG is not yet reaching a sufficient concentration, therefore, a little later will be repeated tests.
If we talk about the rates of hCG in the blood serum, we can navigate the following table:
Non-pregnant women and men - 0-5;
1-2 weeks of pregnancy - 25-300 mU / ml;
2-3 weeks of pregnancy - 1500-5000 mU / ml;
3-4 weeks of pregnancy - 10 000-30 000 mU / ml;
4-5 weeks of pregnancy - 20 000-100 000 mU / ml;
5-6 weeks of pregnancy - 50 000 - 200 000 mU / ml;
6-7 weeks of pregnancy - 50 000 - 200 000 mU / ml;
7-8 weeks of pregnancy - 20 000 - 200 000 mU / ml;
8-9 weeks of pregnancy - 20 000-100 000 mU / ml;
9-10 weeks of pregnancy - 20 000-95 000 mU / ml;
11-12 weeks of pregnancy - 20 000-90 000 mU / ml;
13-14 weeks of pregnancy - 15 000-60 000 mU / ml;
15-25 weeks of pregnancy - 10 000-35 000 mU / ml;
26-37 weeks of pregnancy - 10 000-60 000 mU / ml.
By the way, it should be borne in mind that the norms of the chorionic gonadotropin are given for pregnancy terms from conception.