I don't know. I couldn't find anything either. I just wanted to say that my OB put a small hole in my bag of waters during a routine vag. exam at her office when I was 37 weeks. Then, the next day, at the hospital, after being on pit. and continual efm for 26 hours, she fully broke my water just by doing another vag. exam. I was young, and naive (ie, trusted doctors) and I won't be doing any more of those during pregnancy.