Borderline amniotic fluid index and perinatal outcomes in the uncomplicated term pregnancy

摘要

Objective: To determine perinatal outcomes in uncomplicated term pregnancies with a borderline amniotic fluid index (AFI).Methods: A retrospective review was conducted of uncomplicated singleton pregnancies at term (>37 weeks). Borderline and normal AFI were defined as 5.1AFI8.0cm and 8.1AFI24cm, respectively. Adverse perinatal outcomes, cesarean delivery for non-reassuring fetal heart rate testing, meconium-stained amniotic fluid, a 5-min Apgar score of <7, admission to the neonatal intensive care unit (NICU), and whether the neonate was small for gestational age were compared between the borderline and normal AFI groups.Results: Borderline AFI was not significantly associated with cesarean delivery for non-reassuring fetal heart rate testing (p=0.513), meconium-stained amniotic fluid (p=0.641), admission to the NICU (p=0.368), or a 5-min Apgar score of <7 (p=1.00). However, the number of neonates who were small for gestational age (p=0.021) and rates of induction of labor (p<0.001) were significantly higher in the borderline group. Multiple logistic regression analysis showed that borderline AFI was not associated with cesarean delivery for non-reassuring fetal heart rate testing (odds ratio [OR]=0.72, 95% confidence interval [CI] 0.27-1.91, p=0.52).Conclusion: In uncomplicated term pregnancies, a borderline AFI does not increase the risk of adverse perinatal outcomes.