Sperm competition is the competitive process between spermatozoa of two or more different males to fertilize the same egg during sexual reproduction.
The effects are sort of self-defeating, though, since more fighter sperm means fewer sperm to actually inseminate the egg. So even if it is real.
The idea that millions of sperm are on an Olympian race to reach the egg is yet another male fantasy of human reproduction.
David E. Clapham's lab is one of the few venues in the world where researchers are looking into new ideas for male contraception.
Male ejaculate consists a special type of 'fighter sperm' called 'kamikaze' that is designed to prevent another man's sperm from fertilizing the.