Progesterone

- hormone

- eliberat odata cu estrogen lunar incepand cu teen years la fete

-  estrogen is high in first two weeks of a menstrual cycle (girls is interested socially, relaxed), progesterone is released in last two weeks of menstrual cycle (girl is irritable, wants to be left alone) (s: female brain ch2)

- it kills the connections created in Hippocamp in the estogen phase of the cycle, and that makes girls increasingly irritable, slower in thinking, less focused (this has a calming effect).

- in the fourth weeek, it suddenly withdraws, making girls irritated, yearning for the calming effect

- produced by ovaries (pg 47 female brain)