B HCG. Hcg or human Chorionic Gonadotropin is produced by trophoblasts. Trophoblasts are placental cells. Hcg is made of two parts (alpha and beta) and is composed of amnio acids. Hcg levels increase early in pregnancy and double every couple of days until about 10 weeks. By the way, HCG levels peak at about 10 weeks and at a level of about 10, 000.
Pregancy hormone. Hcg or human Chorionic Gonadotropin is the pregnancy hormone. B-hcg refers to the "beta subunit" of the molecule. It is the beta subunit that differentiates HCG from other similar protein hormones. With the exception of some tumors that produce hcg, the presence and amount of HCG in the blood relates to pregnancy. It normally rises in the 1st trimester, levels off in the 2nd and 3rd trimesters.