I won't be having one this time (I actually am hoping to go over my due date lol, possibly by as much as 8 days) but with DD I had one done at 41 weeks (my hospital doesn't do them before 40 weeks and I was 39+6 at my 40 week appointment so I had to wait a week). Less than 48 hours later I had my show followed soon by my waters breaking, but no contractions til late that night and she was born the following evening. Impossible to say whether the sweep had any contribution.