Comparative evaluation of fetal renal artery hemodynamics in normohydramnios, idiopathic oligohydramnios and polyhydramnios in third trimester pregnancy

Abstract Objective To compare the renal artery (RA) flow indices (RI and PI) among normohydramnios, idiopathic oligohydramnios, and polyhydramnios and determine applicability of fetal RA Doppler indices in predicting the pregnancy outcome. Methods Total 106 3rd trimester pregnant patients were divided into cases and controls based on amniotic fluid index. Routine antenatal and color Doppler (including kidneys) ultrasound was performed for all patients in this study. The postnatal follow‐up was done, and the pregnancies having poor outcomes in terms of NICU admissions were assessed. Results Statistically significant differences were noted when comparing RI and PI values of normohydramnios (0.91 ± 0.04 and 2.38 ± 0.21, respectively) with oligohydramnios (1.02 ± 0.07 and 2.99 ± 0.38, respectively) and polyhydramnios (0.90 ± 0.12 and 2.7 ± 0.84, respectively) independently (p value