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Also called human chorionic gonadotropin. Biochemistry. a hormone, produced in the incipient placenta of pregnant women, that stimulates the production of estrogen and progesterone: its presence in blood or urine is an indication of pregnancy.
Pharmacology. a commercial form of this substance, obtained from the urine of pregnant mares, used in medicine in the treatment of testicular disorders and functional uterine bleeding, and in veterinary medicine in the treatment of cystic ovaries, especially in cows and mares.

chorionic gonadotropin n.
Abbr. CG
A glycoprotein that is produced by the placenta and is excreted in the urine of pregnant women, and that acts to stimulate ovarian secretion of the estrogen and progesterone that are required to maintain the conceptus; it is used as an aid for conception and in the treatment of cryptorchidism. Also called anterior pituitary-like hormone, chorionic gonadotropic hormone, human chorionic gonadotropin.


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  • Chorionic-villus-sampling

    noun 1. a prenatal test for detecting birth defects at an early stage of pregnancy, involving removal by needle of fluid from the chorionic villus, and examination of the cells obtained. noun 1. a method of diagnosing genetic disorders early in pregnancy by the removal by catheter through the cervix or abdomen of a tiny […]

  • Chorioretinal

    chorioretinal cho·ri·o·ret·i·nal (kôr’ē-ō-rět’n-əl) adj. Relating to the choroid coat of the eye and to the retina.

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