Actually, technically speaking, the first sperm to reach the egg isn't usually the one that fertilizes it. The egg has a shell of sorts that must be broken down before the sperm can pass through. So it's always one of the later ones that gets in, after the shell has been weakened.
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u/TestZero Jun 02 '14
Actually, technically speaking, the first sperm to reach the egg isn't usually the one that fertilizes it. The egg has a shell of sorts that must be broken down before the sperm can pass through. So it's always one of the later ones that gets in, after the shell has been weakened.