My husband's cousin and his wife are having their third baby this year and will be having an elect c/s at 40 weeks. She went overdue with her previous two, so it's not likely that she'll go early and she said that the paeds prefer them to be 40 weeks or as close as possible as they're less likely to have issues with their lungs etc. Mind you, she wouldn't have an issue if she went into labour beforehand (i.e., there's not medical/scar issues). I got the impression that if their obs was a bit more supportive, they would have tried for a vbac.