India, Sept. 12 -- Pregnancy can last just a few weeks in some animals, while others carry their young for many months. But there is one animal whose pregnancy is so long that it can stretch to almost two years. So, which animal has the longest pregnancy? The answer may surprise you.

Which Animal Has the Longest Pregnancy?

The elephant holds the record for the longest gestation period among land mammals. An elephant pregnancy typically lasts around 18 to 22 months, with some pregnancies approaching the two-year mark.

That means a female elephant can carry her developing calf for nearly twice as long as a human pregnancy.

The unusually long pregnancy is closely connected to the elephant's enormous body size and the complex development ...