Earlier quoted context omitted.
That will not lead to a drop in fertility. Infact, that's exactly how high fertility societies operate. At least the Islamic ones, like Afghanistan for example, where the population doubled since 2001. Fertility has been dropping since the 80s, long before anything to do with wokeism or meetoo or whatever.
I don't think the population is doubling in Afghanistan because of segregated school classes. There might be another confounding factor you're forgetting...
That's not what I said.
I said high fertility societies strictly prohibit dating-like activities in daily life and limit it to pre-designated settings.
This can happen without sex seggergation in school.
Iraq's population also nearly doubled since 2003 (23m to 42m). Schools in Iraq have not been seggregated since forever.