inroduction: Umbilical cord coiling index can help to predict high risk cases at earliest. Our study aimed to determine the association of the antenatal umbilical cord coiling index (aUCI) during the late second trimester with the perinatal outcomes. Materials and methods: This prospective observational study was conducted in National Institute of Medical Sciences Hospital and Medical College, Jaipur in the department of Obstetrics and Gynecology over a period of one year from Jan 2014 to Dec

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... 15. The study included 200 booked pregnant patients who delivered in our hospital and were having their antenatal UCI done in our radiology department at late second trimester. Results: The mean aUCI in the present study was 0.34 ± 0.12 in the normocoiled group, 0.17 ± 0.21 in the hypocoiled group and 0.63 ± 0.22 in the hypercoiled group. Out of 200 cases, 148(74%) of the subjects had normal coiling index, 32 (16 %) had hypocoiling and 20 (10 %) had hypercoiling. IUGR was significantly higher in hypercoiled group while LBW, MSL, preterm and therefore NICU admissions were significantly higher in hypocoiled as compared with normocoiling. Conclusion: Antenatal umbilical cord coiling index is an important parameter to be studied during late second trimester which may help to screen patients at risk of adverse perinatal outcome.