why do women have periods?

why do women have periods

7 Answers

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  • MissA
    Lv 7
    1 decade ago
    Favorite Answer

    When you have a question like this, the way to find out the answer is to ask, "What if they didn't?"

    Maintaining the female body in a constant state of fertility would use up a lot of energy (See Natalie Angier's "Woman: An intimate geography") and would probably have made our ancestors get pregnant too easily and quickly, making it hard for them to care for all their babies. So we evolved a technique in which our body only is fertile for a few days a month. And when we don't need all that cushy uterine lining and extra blood flow, well, it's gotta go somewhere, hence the period.

    Reproductive strategies are always interesting, I think.

  • DNA
    Lv 6
    1 decade ago

    They have periods to shed the lining of the uterus. Each month the uterus prepares for a fertilized egg to be implanted. When it doesn't happen, it sheds the lining. This is what women see as a period.

  • 1 decade ago

    So they can have babies. Every month, a woman's womb prepares itself to nest a baby - when it turns out we're not pregnant, the womb sheds the nesting material.

  • 1 decade ago

    so that we can have baby's! our bodies realease an egg every month then if it is not fertial then our body discharge the egg via a period.

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  • Anonymous
    1 decade ago

    You are in serious need of some biology classes.

  • 1 decade ago

    because we do its the way are bodys work and also the way we can have a baby.

  • 1 decade ago

    i really don't no y i don't like oeriods it takes away your life & money

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