<

We Still Don't Know Why Men Find Ovulating Women More Attractive

Are you in a public place? Look around. Can you tell whether any of the women you see are ovulating, just by looking at them? Neither can anybody else. But several small studies have suggested that men nevertheless find women’s faces more attractive when they’re most fertile. No one knows what signals the men are… » 7/01/15 8:20pm 7/01/15 8:20pm

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

How Do Testicles Know When To Stop Making More Sperm?

Every time someone ejaculates, it produces millions of sperm. But the average pair of testicles produces billions of sperm cells over an entire lifetime. Why don’t they create all of their sperm in one go? Answer: Because testicles have a complicated process to avoid running out of sperm and endangering future… » 5/04/15 4:31pm 5/04/15 4:31pm

Want to know if a man is fertile? Check his bones.

For gentlemen only: Your fertility may be dictated by your skeleton. New research in mice has shown that there's a very strong link between the bone hormone osteocalcin, and the production of testosterone. Male mice with low levels of osteocalcin had small and infrequent litters compared to those with higher amounts… » 2/18/11 3:51pm 2/18/11 3:51pm