Sperm gets ejected from the penis, enters the vagina, and swims up the reproductive tract until they reach the egg to fertilize it. Barely years ago, it was considered a major scientific breakthrough when scientists came up with the idea that a fully formed, tiny human inhabited the head of each sperm — totally debunked and untrue. Fortunately, as the human body has evolved over thousands of years to maximize fertility potential, so has our scientific understanding about sperm. But many of us still believe some pretty unscientific, long-standing sperm myths. Here are twelve of the most common ones. The common tale is that millions — anywhere from 20 to million , to be precise — of heroic sperm swim in competition with each other to be the lucky little swimmer that penetrates the egg.
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