I heard from someone that the "biological clock" was made up after the war to convince women to quit their careers.

Hearing all this, and hearing that homosexuality used to be tolerated, it's scary to wonder how much of the status quo is not just _a_ social construct, but purposely constructed for someone's benefit, and recently. And we're expected to presume that it's natural, or at least old, and therefore correct.

I went to poke at Wikipedia just for giggles: https://en.wikipedia.org/wiki/Age_and_female_fertility

Love the [citation needed] and lack of clarity in that second paragraph.

Sounds reasonable that it had that effect, but citation needed on the intention.

It becomes more reasonable to assume the intention when you realize how much of national infrastructure policy was meant to engineer specific social outcomes - particularly with regard to segregation. Also in how much of regulatory policy - particularly in telecommunications - was intended for the same.