This article was reviewed by Julia Switzer, MD, FACOG. If you’re entering perimenopause or menopause, you’ve probably heard about hormone replacement therapy (HRT) — and you might be wondering about ...

Progesterone is a hormone that plays a big part in reproduction. It's made mostly in the ovaries, and the level fluctuates with your menstrual period. There is less progesterone after menopause.

Progesterone is the main pro-gestational steroid hormone secreted by the female reproductive system. It is linked to the menstrual cycle, pregnancy, and development of an embryo. Progestin is an ...