Question
Which mammal has the longest gestation period?

Which mammal has the longest gestation period?

Last updated: April 12, 2025

When it comes to pregnancy, humans think we have it rough with nine months of waiting (and to be fair, that sounds like nine months too long for me). But that's nothing in the animal kingdom, where some creatures take their sweet time bringing new life into the world. Which mammal spends the longest time carrying its baby before birth?

The African elephant wins this marathon baby-making contest with a mind-boggling 22-month pregnancy, nearly two full years of carrying around their little ones. Female elephants actually spend most of their adult lives either pregnant or raising calves, making them nature's most dedicated moms. Getting through those almost-two-years must feel like an eternity, especially since elephant babies typically weigh around 230 pounds at birth!

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