The controversial oogonial stem cells eluded a team of Swedish researchers who mapped high-quality tissue samples of the human ovary, prompting more questions about the cells’ existence.  

Similarities in gene expression hint at the origin of a certain type of pancreatic tumor that predominantly afflicts women.

A project aims to preserve samples of the climate change–vulnerable animals for future restoration.

A study of a simple marine animal suggests that the common ancestor of cnidarians and bilaterians may have had three germ layers instead of two.

For the first time, scientists generate functional mouse eggs from stem cells in culture.

With the deletion of a single gene, female Japanese rice fish can produce sperm. 

Researchers develop a method to selectively remove mutated mitochondrial DNA from the murine germline and single-celled mouse embryos.

Researchers claim to have successfully transformed stem cells into viable mouse oocytes that produced healthy, fertile pups.

Healthy mice are born from germ cell precursors grown in vitro.