Similarities to the womb and placenta of female mammals indicate a response to common evolutionary challenges in pregnancy.

Marigold, a capybara at the Cape May County Zoo, gave birth to five pups on Friday, just weeks after her sister, Buttercup, ...

Scientists may finally have an explanation for the longstanding mystery of why blue whale calves are rarely sighted, an advance that could help better conserve the critically endangered species. There ...

Stingrays give birth to live babies, but they aren't mammals. Learn all about these fascinating fish that live in oceans and rivers.

The zoo announced that one of its Bornean orangutans, 43-year-old Kalim, had given birth to a baby boy on Oct. 10 ...

In seahorses, it is the males who carry offspring to term. The females lay their eggs into a special brood pouch on the ...

MOSS LANDING, Calif. (KGO) -- The Marine Mammal Center is looking for volunteers to help out during their busiest time of the year, "pupping season." RELATED: Sea lion rescued after trying to cross ...

Trail cameras photographed three northern hairy-nosed wombats with bulging pouches, evidence of the first wild-born joeys at Powrunna State Forest, photos show.