Because it makes them feel secure, They can feel the warmth and hear the the rhythm of the heartbeat, something they lived with since conception.
babies
Farm Babies and Their Mothers - 1954 was released on: USA: 1954
Cows don't drink milk, only cow babies - calves - drink milk. And it comes from their udders, which are pretty far down on their stomachs, just before their hind legs.
Tiger babies suckle milk from their mothers.
They nurse their babies. Like all mammals, they give their babies milk.
In Esperanza Rising the babies got diarrhea because Esperanza fed them plums which do not agree with their stomachs
Dolls or plush toy Babies with lights inside their heads or stomachs. They are made by several manufactures.See "related link"
No, sharks do not eat each other in their mother's stomachs.
Piglets (babies) Sows (mothers) Boars (fathers)
Tiger babies suckle milk from their mothers.
There is no scientific evidence to suggest that babies can sense pregnancy in their mothers or in other pregnant women.