Don't forget it works both ways; the older the man is the more chance his offspring has of having things like autism, apparently!
Health wise, the pro's outweigh the con's of babies being born from young parents compared to old parents. The vast advantage above all else is the likelihood of the child being born to older parents is the better chance of being more higher educated than their parents and/or financially more comfortable throughout their entire life.
My mum had my sisters when she was 20 and 22, me when she was 30, my older sister had kids at 30, 33, 39 and during each day of birth she had zero issues at all and she was back home the same day of giving births. No cesareans required or anything. Together 7 years before their first born came.
And yet here is me I get bored of being in relationship after a few months, the older I get I find that I'm always attracted to women in their 18-20's. I'm like way different to my sister (she claims two men, suurrrre!! lol), she's had at most a few blokes in her earlier years, while I'm like... lost count (women), I was the baby of the family - when I was a kid, and yet we all get on really really well I wouldn't trade any of them in for anything or amount of money in the world. I've never even cheated on any girlfriend. My mum keeps badgering me she really wants grandkids from me, while I'm there thinking like - nah, ain't gonna happen! Unless its by "accident" in which case my social life goes totally towards loving the kid... hey I'm no ********, I'd love a kid really! I'm good either way.