hi tonydayl, my first was born at exactly 35 weeks after my waters broke and i went into labour. he weighed 2.5kgs. he did not need breathing assistance but spent the first few days in an incubator to regulate his temperature and oxygen levels. all up he spent 7 days in special care. the main problem was breastfeeding as he didnt have the suck reflex so had to be tube fed for the first few days as well. he also got jaundice so spent some time under the phototherapy lights.
all in all he did really well and was allowed to go home after he was taking all his feeds from the breast or bottle. at first they told me he would need two weeks in special care but he did so well this quickly dwindled to 7 days. once home, he did really well with the breastfeeding and we only had one trip back to the gp with concern about the jaundice but all was fine.
it took him longer to smile etc than full term babies (he smiled at 11 weeks) but other than that all his developmental milestones were pretty much on track after those first few months and he is now a bossy, clever three year old.
a friend of mine had two babies at 34 weeks. i think her first weighed 2 kgs and spent 3 weeks in special care - no oxygen required. her second i think was 2.3kgs and only had a week in special care - again no oxygen required.
the magic milestone seems to be about 33/34weeks and once you get past that point if the babies arrive early, there seem to be far less complications etc.
i wish you all the best.
beccas