With chemical formula C21H30O2, this compound, used to treat prostate cancer, is released by implanted contraceptive devices such as Norplant. Formed in the placenta, most of it is produced by the corpus luteum in the ovary, which secretes it during 
With chemical formula C21H30O2, this compound, used to treat prostate cancer, is released by implanted contraceptive devices such as Norplant. Formed in the placenta, most of it is produced by the corpus luteum in the ovary, which secretes it during menstruation. For 10 points—name this hormone which counteracts the effects of estrogen, and prepares the uterus for implantation.
With chemical formula C21H30O2, this compound, used to treat prostate cancer, is released by implanted contraceptive devices such as Norplant.
{progesterone}