In my honest opinion, it should be taught alongside sex education in general in schools.
Instead of focusing it just on pregnancy and STD prevention, they should teach you what pregnancy and childbirth actually does to the body.
I left school thinking that pregnancy is uncomfortable, but that the "worst" that happened was during you might be sick in the first few months, you pee a lot, you'll ache, and struggle to get comfy. As for the actual birth part obviously it will hurt, and you would end up with a bit of a tummy you might struggle to get rid of, some stretch marks, and your boobs could sag, and your vagina might not be as "tight".
I had NO idea about hyperemesis, gestational diabetes, sciatica, pre eclampsia, placental abruption and other placental issues like where it attaches over the cervix not to the womb and can cause severe life threatening issues. Also didn't know about tearing, possible prolapses, or the fact that almost 50% of women suffer some degree of urine incontinence as an immediate after effect of birth, with some of those suffering for the rest of their lives, and even those that don't are at much higher risk of developing it in future.There's also the risks of fecal incontinence, separated stomach muscles, and probably plenty more than i have forgotten to mention or don't even know about.
These are issues that need to be common knowledge not just for women, but also men. How many women had no idea they may suffer from these post birth issues, and are embarrassed and ashamed and feel they have to hide it from their partners if they are one of the ones who suffer these issues.
Some women (myself included, thankfully i found out about the real after effects of birth before i even got pregnant) may actually factor these potential post birth issues into their decision on having children and decide not to have a child.
Men need to know the realities of how their partners body may change and things like incontinence, since it's taboo and im sure some men are immature and would be horrified/disgusted and thats just not fair.
Also the more talked about it is, the more likely women will see their doctors and not suffer in silence. I have a major phobia of ever becoming incontinent and have spoken to so many doctors, and the sad fact is it takes on average 5 years for a woman to seek help with incontinence, usually because the frequency or severity is increasing.