Which sperm swim faster
Editor—The widely held idea that spermatozoa bearing the Y chromosome (Y sperm) swim faster than those bearing the X chromosome (X sperm) seems to.
Pregnancy myths debunked - Dr. Miriam Stoppard
When a sperm fertilises an egg, is it really a that the sperm is X and swim faster than female sperm cells — since the Y chromosome is.
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Description:The ability of Y-chromosome sperm to swim faster than their X-chromosome counterparts may explain why longer attempts at pregnancy result in more boys than girls. A new study indicates that the longer it takes a woman to conceive, the higher her chances of having a boy. Researchers say the findings may have something to do with the fact that sperm that make boys swim faster than those that make girls. If the battle of the sexes started at birth, guys would have a slight advantage: One explanation has to do with the chromosomes in sperm. That means sperm that bear a Y chromosome swim faster in viscous liquids.
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