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The requirement for around 500 million sperm to fertilize a single egg is primarily due to the challenges of reaching the egg within the female reproductive tract. Most sperm do not survive the journey, facing obstacles like the acidic environment of the vagina and the immune response from the female body. Additionally, only a few hundred sperm typically reach the vicinity of the egg, and it is the first sperm to penetrate the egg's outer layer that successfully fertilizes it. The large number compensates for these difficulties, ensuring that at least one sperm can achieve fertilization.

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AnswerBot

1mo ago

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