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Eur J Obstet Gynecol Reprod Biol. 1989 Mar;30(3):257-62.

Duration of the latency period in preterm premature rupture of the membranes. Maternal and neonatal consequences of expectant management.

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Department of Gynecology and Obstetrics, National Hospital, Oslo, Norway.


111 pregnancies complicated with premature rupture of the membranes (PROM) at a gestational age between 20 and 34 weeks, were observed prospectively with expectant management. Median duration of the latency period was 7 (0-109) days. The duration of the latency period was inversely related to the gestational age at PROM. Intra-uterine death ensued in 9.9% of the pregnancies. Clinical chorioamnionitis ensued in 12.6% of the pregnancies. Eight (7.6%) neonates developed sepsis. None of the babies died as a consequence of sepsis alone. Of the 43 (41.0%) neonates who developed idiopathic respiratory distress syndrome (IRDS), 8 (7.6%) babies died. The perinatal mortality rate was 18.6%. The study seems to justify the expectant management of PROM pregnancies of less than 34 weeks of gestation.

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