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.

Mammalian fertilisation culminates in the precise merger of sperm and egg membranes, a process orchestrated by an intricate interplay of cell surface proteins and specialised membrane domains. Recent ...

The cellular mechanisms that allow the fusion of sperm cells and egg cells originated three billion years ago in unicellular archaea – single-celled organisms that lack a nucleus – according to a ...