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During pregnancy the hormone prolactin promotes the necessary development in the mammary glands for the production of milk although the high progesterone levels will suppress milk production. After birth the placenta is gone and with it the progesterone that it was producing. At this point the mammary glands are ready to supply milk to the newborn infant. The infant by suckling causes a reflex release of milk. It is the continued stimulation by the baby that keeps the milk supply constant.
http://www.answers.com/library/Children's%20Health%20Encyclopedia-cid-45250
What else can I help you with?
Can mammals survive without nipples?
No, mammals cannot survive without nipples because nipples are essential for feeding newborn offspring with milk.
What is the name of the hormone that regulates milk secretion?
The hormone that regulates milk secretion is called prolactin. It is produced by the pituitary gland in response to the stimulation of the nipples during breastfeeding.
Why do we have nipples and what is their purpose in the human body?
Nipples are present in both males and females because they develop before gender is determined in the womb. Their main purpose in the human body is to provide a way for infants to receive milk from the mother during breastfeeding.
Should a womans nipples go in?
Normally they do not, but inverted nipples to occur rarely. At birth all nipples are inverted, this is because of the way glands develope as an embryo, but normall proliferation of the mesenchyme behind the nipple will push it out shortly after birth.
Do only mammals have nipples?
No, not only mammals have nipples. Nipples are also found in some other animals, such as birds and some reptiles.
Can you milk a squirell?
If it has nipples, you can milk it!
How do you know when my cat has milk in its nipples?
Squeeze on her nipples.
Are you sure your guinea pig has nipples boy?
if your guineapig has nipples means it still is a boy.
How do you tell the difference between guinea pig boy nipples and guinea pig girls nipples?
Boy guinea pigs don't have nipples.
Why are there yellow spots where your nipples are on your bra that come off in the wash?
Either your pregnant and your milk is coming out early.. or its just sweat!
How many nipples do male bunnies have?
All cats have 8 teats. But the males are for no use at all.
Does darker nipples mean boy or girl?
darker nipples
Do boy cats have nibbles?
No, male cats do not have nipples, only females (girl cats)do this is when they are going to have babies, so the babies will be able to drink their milk.
Why are your nipples small?
because you drink milk
Can a male produce milk from his nipples?
yes
What are the functions of the nipples?
For providing 'milk' to their babies.
Why do nipples become round and soft?
Women's nipples only get hard when their horney.
