Perinatal outcomes in pregnancies with oligohydramnios after preterm premature rupture of membranes.

OBJECTIVE

Our purpose was to determine whether singleton pregnancies complicated by preterm premature rupture of membranes (PPROM) and oligohydramnios are at an increased risk of having maternal and neonatal morbidity.

METHODS

We performed a retrospective analysis of 389 women with PPROM between 24 and 34 weeks of gestation in a single tertiary center during 2008-2014. Patients were divided into two groups on the basis of amniotic fluid index (AFI) < 5 cm (n = 188) or AFI ≥ 5 cm (n = 201). Perinatal outcomes were compared according to amniotic fluid volume. The Student's t-test and Mann-Whitney U test were used to compare variables with normal and abnormal distribution, respectively. Categorical variables were examined by the chi-square test.

RESULTS

Patients with an AFI < 5 cm demonstrated a significantly shorter latency to delivery (p < 0.001), a higher rate of clinical chorioamnionitis (p = 0.029) and emergency cesarean delivery (p = 0.043) and a lower neonatal Apgar score at first minute (p = 0.004).

CONCLUSION

Initial oligohydramnios after PPROM is associated with shorter latency to delivery, higher rate of clinical chorioamnionitis, higher rate of emergency cesarean delivery, and lower 1-min Apgar score.