Oligohydramnios: how severe is severe?
Nataly Zilberman Sharon, Marina Pekar‐Zlotin, Nadav Kugler, Zohar Accart, Maya Nimrodi, Yaakov Melcer, Howard Cuckle, Ron Maymon
Abstract
Objective To investigate whether the severity of isolated oligohydramnios at term is associated with increased rates of adverse perinatal outcome.Study design A retrospective study conducted in a single medical center from 2017 to 2019. All low-risk pregnancies with incidental isolated oligohydramnios at term were included. The degree of oligohydramnios was arbitrarily classified into mild (AFI = 41–50 mm), moderate (AFI = 21–40 mm) and severe (AFI = 0–20 mm).Result A total of 610 women were included: 202 with a mild (33.1%), 287 moderate (47.0%), and 121 severe oligohydramnios (19.8%). Non-reassuring monitor requiring immediate delivery and worse composite neonatal outcome were more common among severe than mild or moderate oligohydramnios (14.0% and 6.4%, 7.3% respectively; p = .039 and 19.8%, 10.9% and 11.8%, respectively; p = .048).Conclusion Low-risk pregnancies with isolated severe oligohydramnios at term have a higher tendency toward non-reassuring fetal monitoring requiring prompt delivery and adverse neonatal outcomes, this calls for close intrapartum surveillance