Progesterone is a female sex hormone.

Progesterone (P4) is an endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans and other species.

It’s produced mainly in the ovaries following ovulation each month.

It’s a crucial part of the menstrual cycle and maintenance of pregnancy. … After you ovulate each month, progesterone helps thicken the lining of the uterus to prepare for a fertilized egg.

The negative side effects:

However, progesterone can cause many side effects including stomach upset, changes in appetite, weight gain, fluid retention and swelling (edema), fatigue, acne, drowsiness or insomnia, allergic skin rashes, hives, fever, headache, depression, breast discomfort or enlargement, premenstrual syndrome (PMS)-like symptoms, …

What is an Ovary?

What are Estrogen hormones?