Human bodies have to be built from a single egg cell that's fertilized by a sperm cell. Many rounds of cell division occur as the body is developing, and it seems that there are plenty of chances for ...

A microscope image of a human egg contains a nucleus taken from a skin cell. (Mitalipov Laboratory at Oregon Health & Science University) WASHINGTON — Oregon scientists used human skin cells to create ...

Early lab work shows reprogrammed skin cells can yield embryos, hinting at future infertility solutions but raising safety questions that demand more study. Infertility affects millions of people ...

Add Yahoo as a preferred source to see more of our stories on Google. The egg with a human skin cell nucleus before fertilization. - Mitalipov Laboratory Scientists have used human skin cells to ...

Who hasn't seen it before: the view through the microscope in which a sperm penetrates an egg cell and fertilizes it. This fundamental step in procreation happens dynamically and seemingly without ...

It's a commonly held belief: Sperm cells are like runners in an epic race, competing against each other for access to the coveted egg at the finish line. The egg, in turn, waits patiently for the ...

What happens when a sperm and egg meet? Scientists know surprisingly little about the molecular mechanics of fertilization; only three proteins central to the process have ever been identified, all in ...

WASHINGTON — A procedure that encourages an egg to begin embryo development without being fertilized could suggest a new way to produce stem cells, at least for certain patients. Researchers were able ...