Oligohydramnios: how severe is severe?

Nataly Zilberman Sharon, Marina Pekar-Zlotin, Nadav Kugler, Zohar Accart, Maya Nimrodi, Yaakov Melcer, Howard Cuckle, Ron Maymon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)5754-5760
Number of pages7
JournalJournal of Maternal-Fetal and Neonatal Medicine
Issue number25
StatePublished - 2022


  • Amniotic fluid index
  • low risk pregnancies
  • obstetric outcome
  • oligohydramnios


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