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 ...

Imagine a future where a diagnosis of untreatable male infertility is no longer the end of the road—because science has found a way to produce human sperm from lab-engineered testicular tissue. This ...

We all know the drill for reproduction—sperm meets egg. But mice aren’t people. And the same recipe doesn’t work for human reproductive cells. One reason, according to Dr. Mitinori Saitou at Kyoto ...

Katsuhiko Hayashi pulls a clear plastic dish from an incubator and slides it under a microscope. "You really want to see the actual cells, right?" Hayashi asks as he motions toward the microscope.

Imagine a future where a diagnosis of untreatable male infertility is no longer the end of the road – because science has found a way to produce human sperm from lab-engineered testicular tissue. This ...

On a cloudy day on a gritty side street near the shore of San Francisco Bay, a young man answers the door at a low concrete building. "I'm Matt Krisiloff. Nice to meet you," says one of the founders ...

They're leading in the development of IVG, new fertility technology that could make sperm and eggs from practically any cell in the body. The... Japanese scientists race to create human eggs and sperm ...

This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Katsuhiko Hayashi pulls a clear ...

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) ...