What Is Pyelectasis Of Fetus?

What Is Pyelectasis Of Fetus? The most common causes of pyelectasis are: Ureteropelvic junction obstruction: A blockage of urine between the kidneys and the ureter. Vesicoureteral reflux: An abnormal flow of urine from the bladder to the kidneys. What causes fetal pyelectasis? The most common causes of pyelectasis are: Ureteropelvic junction obstruction: A blockage of