Females store sperm in their reproductive tract for up to two months and give birth to live offspring.

The female can store sperm to fertilize its eggs, sometimes years later.

Remarkably, female common box turtles can store sperm for up to four years after mating, and thus do not need to mate each year.

The shark has been known to store sperm up to 843 days although, there are some circumstances of poor egg development in eggs laid later.

The female's ability to store sperm has important consequences for birds' mating behaviour.

Its job is to store sperm while they mature.

They can store sperm for at least 15 months.

"Rays have been known to store sperm and not give birth until they decide the timing is right".

There is some conflicting reports on whether active females store sperm.

A certain species of turtles can store and use viable sperm for at least three years following mating.