TOPICS: Potter syndrome, renal agenesis, multicystic dysplastic kidney (MCDK), autosomal recessive polycystic kidney disease (ARPKD), posterior urethral valve, ureteropelvic junction obstruction, duplex collecting systems, horseshoe kidney, renal stones, recurrent UTIs, oligohydramnios, pulmonary hypoplasia, renal failure, amniotic fluid, placental insufficiency, ureteric bud, metanephric mesoderm, bladder, urethral junction, vesicoureteral reflux, hydronephrosis, metanephric mesenchyme, Turner syndrome, trisomy 13, trisomy 18, trisomy 21, hypertrophy of the detrusor muscle, ureteropelvic junction obstruction, ureteropelvic junction, renal pelvis, pyelonephritis, bifid ureter, reciprocal induction, nephrogenic cord, pronephros, mesonephros, mesonephric duct, metanephros, cloaca, superior mesenteric artery, renal artery, inferior mesenteric artery, kidney