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 ...

Christian Kramme grew up in a big family, the youngest of seven kids raised in California’s Santa Clarita Valley. By the time he moved across the country to do a PhD in George Church’s lab at Harvard, ...

Hormone levels fluctuate like the tides, ebbing and flowing according to carefully orchestrated cycles. These hormones not only influence the body, but can cross into the brain and shape the behavior ...

Despite the fact that we all start out as an egg cell in one of our mother's ovaries, these human reproductive organs are surprisingly under-studied. Scientists have been working on creating in vitro ...

Your body’s internal clock isn’t just about feeling sleepy – it’s orchestrating a complex hormonal ballet that affects everything from your mood to your metabolism. We often think about sleep as ...

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 ...