Progesterone

Progesterone (abbreviated as P4), also known as pregn-4-ene-3,20-dione,[5][6] is an endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans and other species.[7] It belongs to a group of steroid hormones called the progestogens,[7] and is the major progestogen in the body. Progesterone is also a crucial metabolic intermediate in the production of other endogenous steroids, including the sex hormones and the corticosteroids, and plays an important role in brain function as a neurosteroid.[8]

It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.[9]

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