Have been searching for answers to the following but no luck so far. Does anyone know why, if GBS can cause premature labour (and PROM) antibiotics are not administered (or, any other sort of intervention) during pregnancy to try and prevent the PROM? Why are women left to continue pregnancy without intervention (not necessarily ABs - holistic perhaps?). What puzzles me is that if the link between GBS and PROM is strong then why do medics not mention trying to intervene/do something about it during pregnancy? All I've read about so far is that if you are a carrier (or colonised), then you'll have ABs in labour. What evidence is there that GBS causes premature labour, i.e., if any ladies feel sure that GBS caused their PROM/premature labour, then how do you know? Is it a 'feeling' or have you had a test to determine the link?