What molecule keeps the corpus luteum viable for several weeks after fertilization?

Question

Quizplus · Accepted Answer

Chorionic Gonadotropin (CG) is produced by the newly formed blastocyst and acts on the corpus luteum, stimulating the production of progesterone and estrogen. These hormones are necessary to maintain the endometrial lining for implantation and early pregnancy. CG also prevents the regression of the corpus luteum, allowing it to remain viable for several weeks until the placenta takes over hormone production.

What Molecule Keeps the Corpus Luteum Viable for Several Weeks