Human chorionic gonadotropin is a substance secreted by the placenta after pregnancy. Testing for human chorionic gonadotropin can determine whether pregnancy has occurred and whether chorionic gonadotropin levels are normal after pregnancy. Diluting human chorionic gonadotropin, a common prescription drug, is also a glycoprotein secreted by cells in the placenta, which stimulates the production of sex hormones. After injection of this drug can prolong the life of the female corpus luteum, improve the level of progesterone in the body, has a certain role in fetal protection. At the same time also can stimulate the female body of androgens to estrogen conversion to promote the formation of progesterone. Of course, this drug must be clearly diagnosed before it is used, and can be rationally administered under the correct guidance of specialized doctors.

　　The role of human chorionic gonadotropin is to maintain the corpus luteum of pregnancy.

　　The biological functions of HCG of human chorionic gonadotropin include:

　　(1) It ACTS on the lutein of menstruation, binds with the receptor of the lutein membrane, activates adenylate cyclase, produces the biological reaction to prolong the lutein life, makes the lutein enlarge to become the lutein of pregnancy, increases the secretion of steroid hormone to maintain the pregnancy;

　　(2) can inhibit lymphocyte immunity, can protect the trophoblastic layer with hormone barrier from maternal immune attack; HCG has similar biological activity to LH, and can induce ovulation when used in combination with HMG.

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