>>509476618>Any women who hasn't ruined her body with birth control and drugs should be able to have kids up until 40.Not exactly. Women get their entire ovarian reserve while gestating in the womb. Every period leaves less eggs in the carton, which obviously depletes to near zero by age 40, which is also when they're nearing menopause since menopause is what basically makes a woman into a grandmother by default whether she has kids or not.
>It was common for women to keeping having children into their mid 40s when people lived off the land. Every pregnancy a woman goes through stops her menstrual cycle for 9 months, putting her ovaries into a 9-month stasis, prolonging her overall fertility. If a woman starts having kids at age 16, and has 12 kids by age 33, then over those 17 years she has saved no less than 12 years’ worth of fertility relative to a woman who has her first child at 33.
Back then, most women had kids when biologically appropriate, which made it vastly easier to have more into their 40s if they did.
Most women will not conceive a child naturally at age 40, and if they do then they're a statistically insignificant.
Granted, environmental damage (plastics, the pill, pollution etc.) to DNA is worse than ever, but age still plays the biggest part.