Biological sex is usually described in simple binary terms: male or female. This works well for germ cells (sperm versus eggs ...

In 2016, two Japanese reproductive biologists, Katsuhiko Hayashi and Mitinori Saitou, made an announcement in the journal Nature that read like a science-fiction novel. The researchers had taken skin ...

For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

A Vermont elementary school is reportedly removing "male" and "female" language from its fifth grade science lessons covering the human body, puberty and reproduction. In a letter sent home to parents ...

Where do we come from and how did we evolve into the beings and bodies we are today? The new book "Eve: How the Female Body Drove 200 Million Years of Human Evolution" argues for a better ...

A Vermont elementary school says it will no longer use the words “male” or “female” when teaching fifth-grade students about puberty and human reproductive systems. Families of students at Founders ...