Why does fertility decline with age?

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  • 1 year ago

    same as sex declines with age

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  • Anonymous
    1 year ago

    Because basic biology is designed to not create orphans.

    In the natural order of life, the parent should live long enough to raise the child to maturity. Human maturity is considered to be 18. For a parent to live long enough to raise their child to maturity, they need to have that child before the age of 50 on the average. By the age of 68 to 70, the average human is facing health issues of their own which might make continuing to raise their child a challenge.

    So, the decline of fertility matches the average ability to care for the child that might be created.

  • helene
    Lv 7
    1 year ago

    Because everything declines with age.

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  • LizB
    Lv 7
    1 year ago

    Women have a limited number of follicles in their ovaries, and eventually all of their follicles are either used to release an egg or die off in the process of trying to ovulate. We're born with millions, but hundreds try to mature every month, and the majority will die off. Egg quality also declines with age and relative health.

    Men produce sperm continually, but male fertility also begins to decline in their 30s. Although men don't have a clear cut-off for when their bodies stop producing sperm, sperm count and quality declines with both age and relative health. A 45 year old man takes much longer to successfully conceive on average than a 25 year old man does, and is much more likely to have developed some form of male-factor infertility.

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  • Mark
    Lv 7
    1 year ago

    There is a Biological answer which idk exactly

    but the overall answer is rooted in physics as

    everything heads towards decay over time tbt!

    Source(s): Enťropy
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