Progesterone

For males: Progesterone is a steroid hormone made in small amounts (mainly by the adrenal glands and testes). In men it’s not commonly tested, but it can be useful in specific hormone evaluations (e.g., adrenal or steroid-pathway disorders), and levels are typically low.

For females: Progesterone is a key reproductive hormone that rises after ovulation and helps prepare and support the uterine lining for pregnancy. It’s often measured to confirm ovulation, assess the luteal phase, and help evaluate irregular cycles or fertility issues.