I had one with my son, lost my mucus plug about 3 days later and was in labor about 4 days after that. I had him at 39w3d
I'm 39 weeks today, started loosing mucus plug Tuesday an had it done today.
I had one done last Tuesday (38 +2 weeks ) been losing plug for just over a week and still pregnant. But have been having lots of contractions yesterday and today