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Sperm and eggs: the basics of human sex cells

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Y chromosome represents a male and X represents a female.

How long can sperm survive after ejaculation?

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Do Sperm Battle Other Sperm?

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For human spermatozoa, the longest reported successful storage with this method is 21 years. Dr Ronald Ericsson devised a method in which the X and Y sperm are separated and used for insemination of the female when ovulation is expected and are then available to fertilise the egg.

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