A study of 219 extreme premees (<26 weeks) in the UK showed about a quarter of them had a psychiatric disorder at 11 years of age: 12% had ADHD, 9% emotional disorders, and 8% autism spectrum.
I have a hard time with our ability to have kids survive earlier and earlier births. Kids born before their lungs and brains and hearts have developed to normal birth standards end up screwed up in lots of ways. Sometimes I think kids born so young should be treated like hospice patients; if they can live without intubation, they live. Otherwise, let the parents start over.
I know that's not really an option; you can't just tell parents that any kid born before XX weeks doesn't deserve to live, but it also seems to me much like finding out that your fetus has Down syndrome. You never know for sure, but if I were pregnant with a Down syndrome kid, I think I would abort it. What would I do if I knew or thought my kid would have cystic fibrosis, a defective heart valve, an 80 IQ, and a personality disorder? I don't know. What would I recommend others do? I would not recommend anything. That's way above my pay grade.