Live Science Plus
(Image credit: Los Angeles Zoo)
Elephants have the longest gestation period of all mammals. These gentle giants' pregnancies last for more than a year and a half.
The average gestation period of an elephant is about 640 to 660 days, or roughly 95 weeks. By comparison, a human pregnancy lasts an average of 280 days, or 40 weeks. Female elephants live for 60 to 70 years, but only have about four offspring throughout their lifetime.
