A new mathematical model predicts that mammalian sperm cells have two distinct swimming modes. This prediction opens new questions about potential connections between sperm cells’ motor activity and ...

Sperm can modulate their energetics by regulating their flagellar waveform -- how the sperm oscillate their tails -- in order to adapt to varying fluid environments, potentially optimizing their ...

New research shows sperm generate corkscrew-like fluid vortices that spin in sync with their tails, providing an unexpected boost. Reading time 2 minutes When we learn about “the birds and the bees,” ...

Add Yahoo as a preferred source to see more of our stories on Google. Sperm motility refers to the ability of sperm to move or "swim." It is one of the factors tested in a semen analysis. Learn why it ...

Scientists have decoded a protein from sea-urchin sperm that's also found in other animals, including humans, raising a new potential avenue for treating male infertility and developing male birth ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. In nature, patterns of chemical interactions between two different ...

An Orbital Sciences Corporation Antares rocket is seen on launch Pad-0A at NASA's Wallops Flight Facility, Jan. 6, 2014, in advance of its launch.Bill Ingalls / NASA Though sperm are generally ...

Researchers at Newcastle University in England report they have coaxed the first human sperm cells from embryonic stem cells, in a remarkable demonstration of how quickly the field of stem-cell ...