Some sharks and even a salamander retain their fetuses for years sometimes before giving birth. So, what animal has the longest gestation period? Here are the 5 longest periods in the animal kingdom.

So, what animal has the longest gestation period? Here are the 5 longest periods in the animal kingdom. (Image Credit: Matteo photos/Shutterstock) Golden alpine salamanders live in cold climates ...

Emerging research has uncovered disturbing links between diabetes during pregnancy and long-term neurodevelopmental outcomes ...

She arrived after one of the animal kingdom’s longest gestation period, up to 15 months. The baby has been bonding with her attentive mother DeeDee and exploring her new surroundings ...

As solitary animals, the rhinos usually reside in their own separate ... In fact, they predict that she’s already several months into her 15-16 month long gestation period, and that she should be due ...

Researchers reveal that the guinea pig pre-implantation embryo is very similar to the human embryo, spurring a better understanding of infertility and early human development.

“They’re such large-bodied animals with very long ... in the adjacent enclosure and keeps looking over at Kipi and her calf.

ZURICH — A 19-year-old Asian elephant at the Zurich Zoo gave birth this weekend to a male calf whose name, starting with the letter Z, will be announced this week.

and elephant babies have the longest gestation period of any land animal. Can you guess how long that could be? Well, it's a whopping 22 months, for nearly two whole years the elephant baby grows ...

Colossal has managed to breed after genetically engineering ancient dire wolf DNA into genomes of grey wolves, their closest ...

But first, we’ll get to know these creatures a little better. Then, we’ll find out just how long the deer gestation period is and when these hooved animals tend to reproduce. Finally, we’ll find out ...