i dont have statistical data but am a member of a premmie forum. I know there seems to be more mums that had c/s than a natural delivery.

micro prems are usually delivered c/s because they are not fully developed going through the birth canal can harm them.
if u find some statistical data please share it would be interesting!
btw i had a c/s at 33+3weeks i was in labour for 15hrs but as soon as bubs became distressed and HR dropped they wanted him out.