الفهرس 
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Abstract
Background: polyhydramnios is defined as an excess accumulation of amniotic fluid in pregnancy and it has been associated with high risk of maternal and perinatal morbidity and mortality . Methods: This was a retrospective cohort study carried on 160 cases diagnosed as polyhydramnios who admitted to Mansoura fetal medicine unit for anatomical scan from 1//1/1016 to 1/1/2019. For detection the most common causes of polyhydramnios ,our study approved that 26.8% of our cases had past history of diabetes mellitus and 63.7 % had no congenital anomalies to explain the presence of hydramnios ,however 11.7% of these cases (12 case)were diabetic and the remaining 56.2 (90 case) were considered idiopathic . Exclusion of genetic causes was by absence of trisomy soft markers by US. Results: Hydramnios has adverse maternal outcomes including; increased rate of CS, PROM, PP hge and placental abruption. Fetal and neonatal outcomes of polyhydramnios included; increased rate of preterm labor, SGA, LGA, NICU admission and increased rate of fetal and neonatal death .There was a significant correlation between the severity of polyhydramnios and maternal, fetal and neonatal outcomes. The prevalence of polyhydramnios in our study was 10.6%.