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Progesterone
Progesterone
(abbreviated as
P4
), also known as
pregn-4-ene-3,20-dione
, 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 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
.
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