Reference Terms
from Wikipedia, the free encyclopedia

Progesterone

Progesterone is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy (supports gestation) and embryogenesis of humans and other species.

Progesterone belongs to a class of hormones called progestagens, and is the major naturally occurring human progestagen.

Note:   The above text is excerpted from the Wikipedia article "Progesterone", which has been released under the GNU Free Documentation License.
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August 31, 2015

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updated 12:56 pm ET