<P> Changes early in pregnancy prepare the breast for lactation . Pre-birth hormone levels become altered after the birth and stimulate the production of milk . From around halfway through pregnancy , the breasts begin to produce colostrum . Colostrum , a thick yellowish fluid rich in protein , continues to be produced for the first few days after delivery . Around 30 to 40 hours after delivery , the composition of milk changes to mature milk and milk volume becomes copious , an event known as the milk `` coming in '' . Sucking causes the pituitary to release oxytocin that causes to the contraction of the uterus . Progesterone is the hormone that influences the growth of breast tissue before the birth . The postpartum changes that occur in the endocrine system after the birth shift from hormones that prevent lactation to hormones that trigger milk production . This can be felt by the mother in the breasts . The crying of the infant can induce the release of oxytocin from the pituitary gland . </P>
<P> Changes early in pregnancy prepare the breast for lactation . Pre-birth hormone levels become altered after the birth and stimulate the production of milk . From around halfway through pregnancy , the breasts begin to produce colostrum . Colostrum , a thick yellowish fluid rich in protein , continues to be produced for the first few days after delivery . Around 30 to 40 hours after delivery , the composition of milk changes to mature milk and milk volume becomes copious , an event known as the milk `` coming in '' . Sucking causes the pituitary to release oxytocin that causes to the contraction of the uterus . Progesterone is the hormone that influences the growth of breast tissue before the birth . The postpartum changes that occur in the endocrine system after the birth shift from hormones that prevent lactation to hormones that trigger milk production . This can be felt by the mother in the breasts . The crying of the infant can induce the release of oxytocin from the pituitary gland . </P>
when does a woman 's body produce milk
when does a woman 's body produce milk
after the birth
after the birth