Sperm's Herd Mentality

By sticking together, sperm can find a more direct path to the egg.

RELATED TAGS: SEX & REPRODUCTION
sperm
We think of a sperm’s mission as a lonely one, each one hoping to find and fertilize the egg before the rest of pack. In some species, however, sperm literally stick together in a grouping that gives them a competitive boost. How does this all-for-one attitude give sperm that edge? Biologist Heidi Fisher of Harvard University analyzed the behavior of clumping sperm from two different mouse species — one monogamous, one promiscuous — under microscope slides. One contained sperm ...
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