Eli5 How does every sperm know to swim to the egg?
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There is a chemical trail leading toward the currently released egg, the sperm follow this chemical trail that gets stronger the closer to the egg they get. Sperm don’t know anything, they simply respond to the stimuli from the chemical trail.
It’s facinating to know that the first sperm there is not always the first to win. The egg plays a role in the selection process too
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