Progesterone production by the corpus luteum

Progesterone, commonly known as the pregnancy hormone, is one of the main female hormones along with estrogen.

Its production takes place in the woman's ovaries during the second part of the menstrual cycle. Specifically, it is the ovarian follicle that becomes the corpus luteum after ovulation that is responsible for secreting progesterone until the end of the menstrual cycle. In the absence of pregnancy, when progesterone levels begin to decrease, menstruation occurs.