Although embryonic stem cells (ESCs) have been successfully derived from mice and rats, efforts to establish chimeric and germline-competent ESC lines in species beyond rodents have been unsuccessful.

This image shows a human egg after its original DNA has been replaced with DNA from an adult skin cell. (Mitalipov laboratory) Scientists have created human eggs containing genes from adult skin cells ...

More successful IVF, egg cells from men, and sperm cells from women? Biotech researchers aim to greatly expand reproductive opportunity. WATCH: New infertility technologies could make the previously ...

Female mammals are born with all the egg cells they will ever have in their ovaries. Some of these cells therefore live for a long time – and must remain functional throughout this period. Experiments ...

A snapshot from a simulation of how microtubules bend and direct material in a maturing egg cell into a twister-like flow. Egg cells are the largest single cells on the planet. Their size — often ...

Recent research highlights that for fertility and aging, the egg may be the leading lady, but she needs her supporting cast.