Tag: sperm

ScienceDaily (Jan. 25, 2010) Some mouse sperm can discriminate between its brethren and competing sperm from other males, clustering with its closest relatives to swim faster in the race to the egg. But this sort of cooperation appears to be present only in certain promiscuous species, where it affords an individual's sperm a competitive advantage over that of other males.

The work is described January 21 in the journal Nature by biologists Heidi S. Fisher and Hopi E. Hoekstra of Harvard University.

CHICAGO (Reuters) - U.S. researchers have found a way to coax human embryonic stem cells to turn into the types of cells that make eggs and sperm, shedding light on a stage of early human development that has not been fully understood.

The findings could lead to new understanding of inherited diseases and transform treatments for infertility, they said.