USMLE Step 2 CK Lecture Notes 2019: Obstetrics/Gynecology (Kaplan Test Prep)

OB TRIAD

Human   Chorionic   Gonadotropin    (hCG)

The functions of hCG are as follows:

If hCG levels are high, twin pregnancy, hydatidiform mole, choriocarcinoma,
or embryonal carcinoma can occur. If levels are low, ectopic pregnancy,
threatened abortion, or missed abortion can occur.

Produced    by  syncytiotrophoblast

Similar to  LH, FSH,    &   TSH

Maintains   corpus  luteum

Maintain    corpus  luteum  production  of  progesterone    until   the placenta    can

take    over    maintenance of  the pregnancy

Regulate    steroid biosynthesis    in  the placenta    and fetal   adrenal gland   as  well

Stimulate   testosterone    production  in  the fetal   male    testes