Sperm cells have been created from a female human embryo in a remarkable breakthrough that suggests it may be possible for lesbian couples to have their own biological children. British scientists who ...

Researchers at the MRC Laboratory of Medical Sciences (LMS) and Imperial College London have shown for the first time that, before they can start developing into egg and sperm cells, the embryonic ...

Once a sperm has broken through to an egg cell in order to fertilize it, the two cells need to hold together tightly. This occurs via a type of protein binding that is among the strongest in ...