What is the primary role of progesterone in females?

Progesterone plays a crucial role in the female reproductive system, primarily functioning to maintain the lining of the uterus. After ovulation, the ovaries release progesterone, which prepares the endometrium (the uterus lining) for a potential implantation of a fertilized egg. If pregnancy occurs, progesterone continues to support the uterine environment, ensuring that the lining remains conducive to sustaining the developing embryo. If a fertilization does not happen, progesterone levels fall, leading to the shedding of the uterine lining during menstruation.

While progesterone is involved in regulating aspects of the menstrual cycle, its most significant role is maintaining a suitable environment for early pregnancy, highlighting its importance in reproductive health.