Progesterone hormone

A female sex hormone essential for the functioning of the female reproductive system. Progesterone is made in the ovaries, and small amounts are produced by the adrenal glands and testes. During the menstrual cycle, changing progesterone levels cause thickening of the endometrium and menstruation. If pregnancy occurs, progesterone is produced by the placenta; a fall in its level helps to initiate labour. Progesterone also causes increased fat deposition and increased sebum production by glands in the skin.


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