In each one, a female shark will have between 16 and 23 fertilized eggs. ... After being in the womb for eight to nine months, two pups – one from each uterus – will make it out into the sea.

(Yes, sharks have two uteruses.) More often, however, they'd catch the moving embryos after the fact, when they'd check on a shark and find that the total count of shark embryos in one uterus had ...

Sharks have been around for up to 450 million years. ... Female sand tiger sharks have two uteri. In each, the biggest embryo will consume its womb-mates until it's the only one left, ...

Giant Ancient Sharks Had Enormous Babies That Ate Their Siblings in the Womb Some sharks lay eggs, while others give birth to live young. In most sharks, however, the eggs hatch inside the mother.

Preemie sharks that would otherwise die get by with a little help from a human-made womb. This article was originally featured on Hakai Magazine, an online publication about science and society in ...

Female sand tiger sharks have two uteri. In each, the biggest embryo will consume its womb-mates until it's the only one left, so the mother will only give birth to two pups. 8.

A few years ago off Florida, fishermen hauled in a bull shark whose uterus contained a two-headed fetus. In 2008, another fisherman discovered a two-headed blue shark embryo in the Indian Ocean.

The female sand tiger shark mates with several males, so her embryos have multiple fathers, but research has shown that in 60 percent of the litters the two pups came from the same father.

The recently spotted shark was much smaller than an adult—like, fresh-out-the-womb smaller. The baby shark bore two signs it was a newborn, the first being a whitish film cloaking its body.

There are over 500 species of sharks in the world. Though they fit into one animal category, they do have reproductive traits that make it confusing.