Scientists used stem cells to create a model of an embryo in the lab without sperm or egg. The model embryo released the same hormones that trigger positive pregnancy tests. Researchers hope to use ...

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 ...

The curved shape of a zebrafish egg causes unequal cell divisions, creating larger cells near the animal pole and smaller ...

Scientists have created egg-like cells capable of fertilization using DNA from ordinary skin cells in what could be a major breakthrough for infertility research. Using a newly developed technique to ...

A lot happens in the first month of human embryo development as a single cell morphs into multitudes. Yet despite its significance, this period is basically a “black box” to researchers, says stem ...

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 ...

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.

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