Worm sperm stimulate ovulation

A protein that nematode sperm cells use for getting around also stimulates egg

maturation and ovulation in the worms, according to a report in March 16 Science.

Triggering ovulation with major sperm protein, or MSP, ensures that eggs aren’t

released at a time when there’s no sperm around to fertilize them, explains

coauthor David Greenstein of Vanderbilt University School of Medicine in

Nashville.