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 ...

Modern comforts promise ease, yet a growing body of research suggests our bodies are still tuned for a very different world.

Human biology evolved for a world of movement, nature, and short bursts of stress—not the constant pressure of modern life.

FILE - In this Aug. 14, 2013, file photo, an in vitro fertilization embryologist works on a petri dish at a fertility clinic in London. Tens of thousands of people undergo in vitro fertilization every ...

Researchers have captured the very first real-time, three-dimensional images and videos of a human embryo implanting into synthetic uterine tissue—revealing a key stage in reproduction. The resulting ...

Scientists have created human eggs containing genes from adult skin cells, a step that someday could help women who are infertile or gay couples have babies with their own genes but would also raise ...

Stanford law professor and bioethicist Hank Greely predicts that in the future most people in developed countries won't have sex to make babies. Instead they'll choose to control their child's ...

Scientists have detected microplastics — the tiny and pervasive fragments now found in our seas, drinking water, food and, increasingly, living tissue — in human semen and follicular fluid, according ...

Researchers produced the immature egg cells (seen in pink) out of stem cells created using human blood Saitou Labs A team of Japanese researchers has successfully created oogonia, or primitive ...

In a little-noticed study published earlier this year, scientists from Oregon Health & Science University reported the birth of three mouse pups that had been created with a never-before-used recipe ...

Thanks to more than three decades of monitoring, researchers at the University of Granada reveal how human absence during the ...