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Evaluation of antenatal umbilical coiling index at 16–21 weeks of gestation as a predictor of trisomy 21 and other chromosomal defects - Verkleij - 2013 - Ultrasound in Obstetrics & Gynecology - Wiley Online Library
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Prenatal ultrasonographic prediction of the umbilical coiling index at birth and adverse pregnancy outcome - De Laat - 2006 - Ultrasound in Obstetrics & Gynecology - Wiley Online Library
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Gross patterns of umbilical cord coiling: Correlations with placental histology and stillbirth - ScienceDirect
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Evaluation of Sonographic Measurement of Umbilical Cord Coiling Index in the Second Trimester and Its Correlation to Perinatal Outcome | Auctores
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Amnioinfusion and Bed Rest May Effectively Improve the Insufficient Circulation of the Umbilical Cord in Pregnant Women With Hyper-Coiled Cord and Oligohydramnios | Nakamura | Journal of Medical Cases
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