What indicators hgch should be during pregnancy
Human chorionic gonadotropin (hCG) is a hormone that begins to be produced by the germ cells of the embryo after the fertilized egg is attached to the uterine wall. The level of hCG is determined in the blood or urine, with which the hormone is released in unchanged form. The concentration of gonadotropin during pregnancy does not change linearly. In a non-pregnant woman, the content of gonadotropin is in the range of 0-25 mIU / ml.
In the first 4-6 weeks of gestation, there is a sharp increase in this indicator twice every two days. In the first or second week of pregnancy, the hormone content in the blood varies in the range of 25-300 mU / ml. The peak concentration of hCG is noted at 7-11 weeks after conception and is 50000-200000 mIU / ml. Further, there is a slight decrease to the level of 20,000 mIU / ml in the second trimester of pregnancy. These figures remain almost unchanged until the third trimester, in which there is a slight increase in the concentration of chorionic gonadotropin.
Quantitative determination of hCG in venous blood is carried out on the 3-5th day of delayed menstruation to confirm or refute pregnancy and at 14-18 weeks to identify a fetal pathology in a pregnant woman. When interpreting the obtained indicators of the hormone in a blood test, it is necessary to determine the starting point of pregnancy. There are tables of hCG, taking into account obstetric terms, which are considered from the date of the last menstruation, other tables are based on the terms from the alleged conception.
To determine the concentration of human chorionic gonadotropin, blood is drawn from a vein in the treatment room of a medical institution. The analysis is done in the morning on an empty stomach after a diet that eliminates fatty and fried foods and alcohol from the diet. It is necessary to inform the gynecologist about taking hormonal preparations before the examination.
An increase in the level of the hormone in the blood can be observed with an incorrect calculation of the duration of pregnancy, multiple pregnancy, prolonged pregnancy, early toxemia, Down's disease in an unborn child, hormonal drugs, diabetes in a woman.A decrease in hCG concentration may be caused by incorrect determination of gestational age, premature examination, threatened abortion, ectopic pregnancy (ectopic pregnancy or uterine with atypical implantation of the ovum), missed (undeveloped) pregnancy, intrauterine death of the fetus, reparative pregnancy, chronic placental insufficiency.