They found that immediately after the egg is fertilized by a sperm, the surrounding egg coat tightens, acting as a hard barrier that stops additional sperm. This critical process, detailed for the ...

Fortunately, the human female has other ideas. For her, it's quality, not quantity. Her ovaries usually produce just one egg every month. The process of reproduction is so complex, it's a wonder ...

A company called Gameto claims to have successfully matured eggs outside of the female body, a development that could revolutionize the in vitro fertilization (IVF) process. "We are thrilled to ...

Two weeks after a human egg is fertilized, primordial germ cells ... first step in research to replicate the developmental process of human germ cells in vitro,” Saitou said.