On a midwife site I frequent, it was mentioned that ACOG recently updated their policy on the care of a woman with PPROM (premature prolonged rupture of membranes). Their most recent protocol is to induce "immediately" for PROM (premature rupture of membranes) rather than waiting 12--16--18--or 24 hours for natural labor to start. This was not based on any new evidence according to this midwifery website. As a homebirth midwife, I traditionally allow my ladies to wait up to 48 hours as long as there are no risk factors and no vag exams. I remember doing an extensive read of the some of the literature and seeing some studies saying even 72 hours was safe with low-risk women and no vag exams. What can you tell me about the research and can you come up with a possible/hypothetical reason why ACOG has changed its practice?