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 ...

China has delivered the world's first human artificial embryo models to orbit to test how microgravity affects human ...

New research from Queen Mary University of London shows how extreme seasonal patterns are causing rainforest butterflies to ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

Spotted hyenas live in hierarchically organized groups (clans). An individual's dominance over another determines priority access to resources such as food or mating partners, and thus reproductive ...