HCG, human chorionic gonadotrophin, is a glycoprotein hormone secreted by
trophoblastic cells of the placenta. Composed of a- and two subunits, it is an
indicator of pregnancy and pregnancy-related diseases.
The important role of HCG
The main function of HCG is to stimulate the conversion of corpus luteum
from the menstrual corpus luteum to the gestational corpus luteum, promote the
continuous secretion of estrogen and progestin, maintain the endometrial
morphology, promote the formation of the uterine decidua, and make the placenta
grow and mature, which is essential for the maintenance of pregnancy.
At the same time, HCG can also inhibit the stimulating effect of lectin on
lymphocytes, and human chorionic gonadotropin can be adsorbed on the surface of
trophoblast cells, so as to prevent embryonic trophoblast cells from being
attacked by maternal lymphocytes.