Which Mammal has the Longest Gestation Period?

Added: 2026-06-02

[00:00:00]Which mammal has the longest gestation period? The African elephant holds the record for the longest pregnancy among mammals. A female elephant is pregnant for about 22 months before giving birth.

[00:00:10]That is almost two full years, making it the longest known gestation period in the animal kingdom. Scientists believe elephants need such a long pregnancy because their babies are born highly developed. Baby elephants must have strong brains, functioning trunks, and enough body strength to survive in the wild shortly after birth. At birth, a calf can weigh around 100 kg and is able to stand and walk within hours. The elephant's large brain also takes a long time to fully develop inside the womb.

[00:00:36]This extended pregnancy helps prepare the calf for life in complex elephant herds. Intelligence and social behavior are very important for survival and communication in the wild.