There is also more recent research showing that in randomized controlled trials cerclage did not reduce the incidence of preterm labor when done on women with short cervixes (not in preterm labor).
It can, however, increase the risk of preterm rupture of membranes (which means the baby has to be delivered). So it is not a risk-free procedure.
http://www.ncbi.nlm.nih.gov/entrez/q..._uids=15183621http://www.ncbi.nlm.nih.gov/entrez/q..._uids=10521734http://www.ncbi.nlm.nih.gov/entrez/q..._uids=11408848http://www.ncbi.nlm.nih.gov/entrez/q..._uids=15507959
I am not a medical professional and I'm not qualified to sum up all the research out there, and this is just some of it. What I'm trying to do is help get you started on your own research so you can make an informed decision.
If you're not already seeing one, I would definitely see a maternal-fetal medical specialist/high-risk OB, someone who's up on all the latest research, and get them to explain to you what they think the latest research means for you in your circumstances. In other words, I would not just see my regular OB, because not all of them keep up with the research.
Good luck, mama!