Researchers have used naïve pluripotent stem cells to create an embryo model that looks and acts like a natural human embryo. They say it’s an ethical way of gaining a better understanding of ...

A team of scientists has created synthetic human embryos from stem cells, without the need for either an egg or sperm — a remarkable breakthrough that raises plenty of thorny ethical questions. While ...

Yale ornithologist Richard Prum firmly believes that science and the humanities can work in concert to help people better understand the world. His own research on birds as aesthetic agents inspired ...

The ability to create egg cells from human skin represents one of the most extraordinary frontiers in reproductive science. Researchers are exploring how to reprogramme ordinary body cells into viable ...

Researchers have developed a new stem cell model of the mature human amniotic sac, which replicates development of the tissues supporting the embryo from two to four weeks after fertilization. This is ...

Off a quiet hallway on the top floor of a building at the University of Osaka in Japan, Katsuhiko Hayashi is hatching a revolution. Human embryo science: can the world’s regulators keep pace? He is on ...

Scientists have created human eggs containing genes from adult skin cells, a step that someday could help women who are infertile or gay couples have babies with their own genes but would also raise ...

Katsuhiko Hayashi, a developmental geneticist at Osaka University, is working on ways to make what he calls "artificial" eggs and sperm from any cell in the human body. (Kosuke Okahara for NPR) ...

Scientists have created human eggs in the lab using a similar process to the one used to clone the famous Dolly the sheep, then used in vitro fertilization (IVF) to turn them into embryos. Although ...

All of us began as a single cell, the fertilized egg. This cell gave rise to a group of "stem cells" that can transform into any cell type in our body to create our complex tissues consisting of ...

The new method offers researchers a powerful new platform to investigate the molecular mechanisms that control oogenesis, the process by which egg cells develop, and lays important groundwork for ...