Progesterone is a hormone produced mainly by the ovaries in women, particularly after ovulation, and by the placenta during pregnancy. Progesterone plays a crucial role in the menstrual cycle and in maintaining pregnancy. After ovulation, it prepares the endometrium (lining of the uterus) for possible pregnancy by thickening it. If pregnancy does not occur, progesterone levels drop, leading to menstruation. During pregnancy, progesterone is necessary to prevent the uterus from contracting prematurely and to support the developing fetus.

Key Functions:

• Prepares the uterus for pregnancy after ovulation.
• Regulates the menstrual cycle by balancing estrogen.
• Supports early stages of pregnancy by maintaining the uterine lining.
• Modulates immune responses and has a calming effect on the brain.