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lsparrish comments on On "Friendly" Immortality - Less Wrong
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One thing that should probably be noted is that doubling life span wouldn't necessarily double the number of years a woman is fertile.
That is true, but life-extending tech/transhumanism doesn't tend to focus on making people be old for a longer period of time, but on lengthening our "peak" years.
This is actually one of the arguments that proponents of life-extending technologies use. Nay-sayers will say: "Well, who wants to be 150 years old? You'd be sick and wrinkly and falling apart, etc?" The general come-back is that the whole point of the tech is to not make you be old until you were, say 130 years old.
I sure as Hell wouldn't expect life-extension through rejuvenation to actually restore eggs in females. They do run out eventually.
Whether or not Logos01 below is correct, the finite number of eggs women have is still vastly greater than the number of children most women have.
Hm, you are right. If I had remembered my basic biology, I would've remembered that women are already born with a finite amount of eggs.
Weak rebuttal: Another reason people don't have children in their 50s-70s is that chasing kids around is tiring. If women knew that they would at least still be young physically at those ages, they might think ahead and have some eggs frozen.
Isn't that currently in doubt? I recall that in other mammals marrow stem cells have been shown to differentiate into follicles, but no studies have shown this to occur in humans yet.
Or have eggs generated through biomedicine practices of the age. We're pretty close to differentiating sperm cells already, eggs can't be that far off.