A new centrosome is introduced by the spermatozoon, and then cell-division or segmentation commences.

Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell ...

The research team plans to grow PGC-like cells into ova and sperm, with an eye toward producing a new northern white rhinoceros calf via artificial insemination utilizing frozen spermatozoon and ...

The Oklahoma measure defines fertilisation as the "fusion of a human spermatozoon with a human ovum". Banning abortion after conception has been a long-held goal of national anti-abortion groups.