India, Sept. 22 -- When it comes to animal pregnancies, the length of gestation can vary dramatically. Some animals give birth in just a few weeks, while others carry their young for well over a year. But what about an animal whose pregnancy lasts around 258 days?

The answer will surprise you. A hardy animal closely related to cattle and famously adapted to the cold, high-altitude regions of Central and South Asia. Research on their reproduction has documented an average gestation period of about 258 days for pregnancies involving purebred calves.

Which Animal Gives Birth After 258 Days?

The animal associated with a 258-day gestation period is the yak.

Female yaks carrying purebred calves have been reported to have an average pregnanc...