So, the chorionic gonadotropin is synthesized by the placenta and is the main hormone of pregnancy. It has a structure similar to luteinizing hormone. The definition of hCG in the body of a future mother, namely, in her blood, allows you to monitor the progress of an interesting position of a woman. When doctors state by analysis the decrease or slowdown in the growth of this hormone, then we can assume an undeveloped or ectopic pregnancy, a threat of miscarriage.
The determination of hCG in a woman's blood allows doctors to diagnose and term the woman's pregnancy. At usual representation of a weak half of mankind its level makes up to 5 mIU / l. Pregnancy tests reveal a hormone if its value in urine will be from 10 to 25 mIU / L. Ultrasound examination will show the fetus when the level of the chorionic gonadotropin reaches 1000 mIU / L. Many women do not need to explain that the physiological course of pregnancy less requires monitoring the level of this hormone, rather than controlling its dynamics after in vitro fertilization. In this case, tracking the hormone is necessary to identify healthy implantation of embryos, their development in the womb of a woman.
This level with the onset of pregnancy varies considerably. This happens not only weekly, but daily. On indicators of hCG and reproductologists are guided in the control over the course of pregnancy after IVF. So, for example, in the first week of the period, the hCG in the blood of the expectant mother is from 156 mIU / l. In the second-third week - 101-4870; on the third-fourth - 1110-31500; on the fourth or fifth - 2560-82300. A sharp jump in the level of hCG after IVF is observed at 5-6 weeks of the term. This is 23100-141 000 mIU / l. Further, it continues to grow, and in the sixth to seventh week is 27300-233000, in the eighth week the figure reaches 291000 mIU / l. But already from 11 weeks and 16 there is a decrease in the level of chorionic gonadotropin in the blood of a pregnant woman. It ranges from 6,140 to 103,000 mIU / L. At the age of 16-21 weeks of gestation, the indicator is further reduced: 4720-80100. The level of the hormone at the period of 21-39 weeks the field of IVF fluctuates within 2700-78100 mIU / l.
Tracking the dynamics of the hormone allows you to conclude that it is the greatest increase in the first month of pregnancy. Then it rises every day-three times twice. It is normal to drop the hCG index from 11 weeks of bearing the baby. The placenta is the organ that functions throughout the entire period of bearing of the child. Therefore, at any time the doctor can determine the level of hCG. When he sees that this indicator decreases much faster than accepted standards, that is, a suspicion of premature aging of the placenta. A sharp decrease in the level of hCG can be evidence of a threat of miscarriage or an undeveloped pregnancy.
It is worth noting, that the effectiveness of in vitro fertilization is estimated two weeks after embryo insertion into the woman's uterus. If after this period the hCG index does not meet the above standards, then the embryo simply did not get accustomed. Usually this is 25 mIU / L or less.
When everything is in order, there are high chances of a successful outcome of pregnancy.
Very often after IVF, a multiple pregnancy can develop. This means that hCG is produced by two placentas. Accordingly, its level will be higher. At the first research it can make 300-400 mIU / l. In the future, its indicators should be multiplied by two, based on the above figures.
Competently interpret the dynamics of hCG after IVF in the blood of a pregnant woman can only reproductologist.