page_title: Progesterone
section_title: Chemistry
hierarchical_section_title: Progesterone / Chemistry
caption_attribution_description: English: Sample of Progesterone
context_page_description: Progesterone is an endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans and other species. It belongs to a group of steroid hormones called the progestogens, and is the major progestogen in the body. Progesterone has a variety of important functions in the body. It 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.
  In addition to its role as a natural hormone, progesterone is also used as a medication, such as in menopausal hormone therapy. It was first prescribed in 1934.
context_section_description: Progesterone is a naturally occurring pregnane steroid and is also known as pregn-4-ene-3,20-dione. It has a double bond (4-ene) between the C4 and C5 positions and two ketone groups (3,20-dione), one at the C3 position and the other at the C20 position.
caption: A sample of progesterone.
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