Scientists have discovered how a sperm and an egg fuse together, in a way that resembles a ‘lock and key’. New research ...

If you're male, your body uses meiosis to create sperm cells; if you're female, it uses meiosis to create egg cells. Others cells in your body contain 46 chromosomes: 23 from your father and 23 ...

Scientists have grown an entity that closely resembles an early human embryo, without using sperm, eggs or a womb. The Weizmann Institute team say their "embryo model", made using stem cells ...

How a sperm and an egg fuse together has long been a mystery. New research by scientists in Austria provides tantalising clues, showing fertilisation works like a lock and key across the animal ...