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Korean Journal of Obstetrics & Gynecology 2004;47(9):1645-1652.
Published online September 1, 2004.
Isolated Oligohydramnios in Low-risk Pregnancy as a Predictor of Adverse Perinatal Outcome.
Joo Young Min, Min Jeung Oh, Geun Joon Cho, Jae Kwan Lee, Kyung Ju Lee, Hai Joong Kim, Jun Young Hur, Ho Suk Saw, Yong Kyun Park
1Department of Obstetrics and Gynecology, College of Medicine, Korea University, Seoul, Korea.
2Department of Obstetrics and Gynecology, College of Medicine, Pochon CHA University, Seoul, Korea.
Abstract
OBJECTIVE
The aim of our study was to assess whether isolated oligohydramnios is associated with adverse perinatal outcomes in low-risk term pregnancy. METHODS: Women delivered between March 2001 and July 2003, who underwent ultrasonography from 37 to 41(+6) weeks gestation were analyzed. Women undergoing labor induction for oligohydramnios were matched by gestational age and parity to women with normal amniotic fluid index measurements. Oligohydramnios was defined as an amniotic fluid index (AFI) 5.0 cm with respect to maternal age, parity, nulliparity, gestational age at delivery. The study (N=21) and control groups (N=100) had similar the primary outcome (rate of total cesarean delivery and rate of cesarean delivery for fetal distress) as well as the secondary outcome variables such as birthweight, Apgar score<7 at 5-min, meconium stained amniotic fluid, and NICU admission >8 day. There were no differences between pregnancies with 5th percentile of AFI with respect to maternal age, parity, nulliparity, and the secondary outcome variables such as birthweight, Apgar score<7 at 5-min, meconium stained amniotic fluid, and NICU admission >8 day. However, pregnancies with 5th percentile of AFI. Rate of cesarean delivery for fetal distress was not significantly different in the two groups. CONCLUSION: We demonstrated that oligohydramnios in low-risk term pregnancy does not affect the increased perinatal morbidity and mortality. Therefore, isolated oligohydramnios may not be a marker for fetal compromise in low-risk term pregnancy, and induction of labor may not be warranted in most cases.
Key Words: Oligohydramnios, Amniotic fluid index, Perinatal outcome
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