Human Chorionic Gonadotropin (hCG) Unit Converter

Human chorionic gonadotropin (hCG) is a hormone produced primarily during pregnancy. It is made by the cells that form the placenta and helps maintain pregnancy by supporting progesterone production in early gestation.

hCG consists of two subunits: alpha and beta. The beta subunit is unique to hCG and distinguishes it from similar hormones like LH, FSH, and TSH. Most pregnancy tests detect this beta-hCG.

Outside of pregnancy, hCG can be produced by certain tumors, making it useful as a tumor marker. In nonpregnant individuals, normal hCG levels are typically less than 5 mIU/mL.

During pregnancy, hCG is produced by syncytiotrophoblast cells, which form part of the placenta. The pituitary gland also produces small amounts of hCG, particularly in postmenopausal women. Outside of pregnancy, certain tumors (testicular, ovarian, or trophoblastic) can produce hCG.