Pregnancy causes elevated levels of the hormone prolactin, which has a key role in the production of milk. However, milk production is blocked by the hormones progesterone and estrogen until after delivery, when progesterone and estrogen levels plummet.
Pregnancy causes elevated levels of the hormone prolactin which has a key role in the production of milk However milk production is blocked by the hormones progesterone and estrogen until after delivery when progesterone and estrogen levels plummet