What are the pregnancy hormones?

HCG: The hormone human Chorionic Gonadotropin (better known as hcg) is produced during pregnancy. It is made by cells that form the placenta, which nourishes the egg after it has been fertilized and becomes attached to the uterine wall. Levels can first be detected by a blood test about 11 days after conception and about 12 - 14 days after conception by a urine test.

Several: In addition to hcg, the ovary produces Progesterone for the first trimester, after which the placenta takes over. Inadequate Progesterone leads to miscarriage, a common reason for habitual miscarriages in women. The placenta also produces estriol, the third human estrogen that peaks in the second trimester & is the reasons women feel so good from 12-28 weeks. There are more as well.