I'm currently 23w pregnant and had an emergency cerclage placed a few days ago after routine monitoring showed my cervix had shortened to 14-15mm. No funneling/opening, so not quite a rescue stitch but the cervix had shortened over 1cm in a week after holding steady since 16w. My first baby was born at 34w, a few days after PPROM with no warning, I wasn't under consultant care last time and all was well with the pregnancy until this point. I did have a lletz treatment years ago which the doctors think is what has caused the cervix issues.
If you've had a cerclage, when was it placed and when did you go into labour? The consultant has said they hope we might get to 36w, but my understanding is that when done as an emergency after changes have been seen, cerclages tend not to be so successful and I can't shake the anxiety of having another, maybe even earlier, premature baby.