There are also concerns about the legal and moral status of embryos. Many countries currently prohibit growing a human embryo ...

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 ...

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 ...

Human reproduction is influenced by a complex interplay of biology, genetics, and socioeconomic factors. Over the past few ...

On the third day after fertilisation a human embryo is made of six to 12 roughly identical cells; on day four its cells appear to fuse into a mostly uniform blob; and on day five it puffs out to ...

We can quickly dismiss the claim that copulation during pregnancy is unique to humans. It is easy to understand how this myth originated. Copulation after conception seemingly serves no useful ...

Recently, scientists have reviewed the existing literature to understand how space travel, space radiation, and microgravity affect human reproductive functions. This review was published in Npj ...

Scientists have detected microplastics in human semen and follicular fluid, the liquid that surrounds an egg in an ovarian follicle. "This is not an isolated finding –– it appears to be quite common," ...