The sperm tail moves very rapidly in 3D, not from side-to-side in 2D, as it was believed. Source: Image credited to polymaths-lab[dot]com New state-of-the-art 3D microscope technology combined with ...

Researchers have uncovered the secret of human sperm propulsion through dense fluids, revealing an unconventional motion that appears to defy Newton's third law. In their study, the team analyzed both ...

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) ...

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 ...

Sperm have to wiggle vigorously to reach an egg, and that motion is key to a clever new fertility test. The technique, tested with bull semen and detailed in Advanced Materials Interfaces, harnesses ...

First it was human embryos. Now scientists are trying to develop another way to modify human DNA that can be passed on to future generations, NPR has learned. Reproductive biologists at Weill Cornell ...