What animals get periods?

Apart from humans and our close relatives, the only animals that menstruate are elephant shrews and certain bats. Why did it only evolve in these species? read more

The list of animals that menstruate is quite short In these species, menstruation is similar to that of humans. For instance, short-tailed fruit bats have cycles lasting 21-27 days, almost as long as that of humans, says Rasweiler. read more

Humans are continuously sexed, e.g. no mating season or receptive period, sex is possible anytime in the cycle. Humans have menses, a shedding of uterine lining following a non-productive fertile stage. As Aarti Dwivedi said overt menstruation. read more