The sperm and the egg cell's nuclei compete for size directly after fertilization and this is necessary for proper embryonic ...

(BOSTON) — More than one-sixth of adults around the world experience infertility in their lifetime. There is a high unmet need not only for increased access to affordable, high-quality fertility care ...

Nearly eight to 12 percent of couples all over the world face fertility issues, with male infertility accounting for almost 50 percent of the cases. 1 A common cause of male infertility is errors ...

Utah startup says it grew human sperm in lab, creating embryos in early test of infertility breakthrough.

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 ...

Harmful genetic changes in sperm become substantially more common as men age because some are actively favored during sperm production, new research has revealed. In a landmark study published today ...

High-resolution imaging reveals a large protein complex in egg cells that stores key developmental molecules. The structure ...