My DD's were both emergency c/s and I went into labour naturally with both but DD1 was 37w6d and DD2 was 39w4d - the difference between the 2 was only in size with DD2 being 900g heavier and 5cm longer than DD1 at birth and DD2 had rolls of fat whereas DD1 was skinny. However, at 3 months DD2 is only 300gm heavier and exactly the same length as DD1 at the same age.

At birth their apgars etc were identical and they were both pretty spot on for milestones etc. so I haven't seen any difference.

If I was going to have another my OB would be doing an elective c/s at 37-38 weeks because of what happened with DD2