Outcomes of pregnancy with premature rupture of membranes more than 12 hours

Abstract

Background: The management of premature rupture of membranes at term pregnancy is not certain whetherthe immediate watchful induction or waiting is better for both mother and infant. It also affectson mode of delivery.

Aim: To evaluate the effect of premature rupture of the membranes (PROM) more than 12 hoursat term, comparing upon intact membranes at term who present with mucous bloody show atadmission, upon outcomes and mode of delivery.

Methods: This retrospective descriptive study was performed by searching medical records from September2004 to October 2009. There were 321 cases of PROM pregnant and 1,043 cases of non PROMpregnant. Criteria for enrolment include (1) PROM more than 12 hours (2) Low risk and termpregnancy, gestational age 37-41 weeks (3) Cervical dilatation of non PROM group less than2 cm. Statistics were analyzed with Chi square test, Fisherûs exact test and student t test.

Results: 321 PROM pregnant whose labor was inducted with oxytocin had a significant higher risk ofcesarean section than 1,043 non PROM group (odds ratio 1.877, 95% CI 1.454-2.425). Withno differences were detected for maternal body weight and infantûs body weight.

Conclusions: Planed labor induction for PROM is associated with higher risk of cesarean in comparison tothose with intact membranes.

Key words: Pregnancy, Premature rupture of membranes