Katsuhiko Hayashi, a developing geneticist at Osaka University, is working with methods to make what he calls “artificial” eggs and also sperm from any kind of cell in the body.
Kosuke Okahara/Kosuke Okahara for NPR
conceal subtitle
toggle subtitle
Kosuke Okahara/Kosuke Okahara for NPR

Katsuhiko Hayashi, a developing geneticist at Osaka University, is working with methods to make what he calls “artificial” eggs and also sperm from any kind of cell in the body.
…