From NICE guidelines
Expectant management of women with prelabour rupture of the membranes at term should not exceed 96 hours following membrane rupture.
5.5 Induction of Labour in the presence of Prelabour Rupture of the Membranes (page 28)
5.5.1 ....Epidemiological data on time interval from term PROM to spontaneous labour demonstrates that most women go into spontaneous labour within 24 hours of rupturing their membranes.
86% of women will labour within 12-23 hours
91% will labour within 24-47 hours
94% will labour within 48-95 hours
6% of women will not be in spontaneous labour witthin 96 hours of PROM.
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