What Should Parents Do With Their Spare IVF Embryos?

When in vitro fertilization was developed in the 1970s, critics of the technique imagined a world a la Aldous Huxley, filled with assembly-line designer babies. It didn’t turn out like that. Instead, the procedure simply gave infertile couples another route to start a family. But it also created a problem that critics » 6/24/15 11:30am Wednesday 11:30am

A Brief History Of Vaginal Cutting During Childbirth

During childbirth, the vagina has to stretch to accommodate a head the size of a grapefruit. This, you may imagine, takes time. So if something goes wrong during labor and delivery has to happen fast, doctors or midwives might speed things along by artificially widening the vaginal opening. With scissors. » 6/12/15 3:03pm 6/12/15 3:03pm

Freezing Your Eggs is Much Harder Than You Realize

We know how to successfully freeze, store, and thaw human sperm. We’re still on a learning curve with human eggs. Abby Rabinowitz’s recent feature at Nautilus explores the all-too limited statistics about how well the process works and the data on why more healthy women are choosing to try it anyway. » 5/13/15 3:40pm 5/13/15 3:40pm

One Weird Trick Female Animals Use to Control Who Gets Them Pregnant

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Much like the United States Congress, the history of science is overwhelmingly white and male, and unsurprisingly, this has led to a pretty significant lag time in scientific understanding of things that relate to women. When it comes to animal sexual selection, we know a lot about how and why males compete for female… » 2/19/15 4:49pm 2/19/15 4:49pm

This African fish can start having babies at 17 days old

The catchily named Nothobranchius kadleci is the fastest-maturing vertebrate species known to science. In just over two weeks, this fish can reach sexual maturity and start laying eggs — and those eggs only need another 15 days before they are ready to hatch. So why does this species need to cram an entire generation… » 9/08/13 11:00am 9/08/13 11:00am

New research suggests women can make sperm, and men can make eggs

What started as an investigation into developmental mouse biology has become a lot more than that. Biologist Katsuhiko Hayashi discovered a way to turn mouse skin cells into sperm and egg cells — and actually used these modified cells to create a living baby mouse. The question is, can it work in humans? » 8/21/13 4:26pm 8/21/13 4:26pm

Bees pay a steep price for that whole "perpetuating the species" thing

If you're going to be reborn as a worker bee, make sure you don't do it in the summer. That's the time of year when the queen bee demands the most jelly to feed her young, and once that work is done, bees typically die just two weeks later. But in winter, otherwise identical bees can live six to seven months, which… » 4/21/13 5:00pm 4/21/13 5:00pm