title: The Impact of Gestational Age at Delivery on Urologic Outcomes for the Fetus with Hydronephrosis.
abstract: OBJECTIVE
  Compare short-term urologic outcomes with delivery timing in fetuses with severe hydronephrosis.
  
  
  METHODS
  An ultrasound database was queried for severe hydronephrosis. Cases were categorized into late preterm/early term (36 0/7 - 38 6/7 weeks) and full term (39 0/7 weeks or greater) groups. Baseline characteristics were compared using standard statistical methods. Spearman's correlation analysis was performed for grade and severity of hydronephrosis on first postnatal ultrasound with gestational age at delivery.
  
  
  RESULTS
  Of 589 cases, 79 (33 late preterm/early term, 46 full term) met criteria. Baseline characteristics were similar between groups. Spearman's correlation coefficients (rs) indicated that increased postnatal Society for Fetal Urology grade, rs= -0.26 (95% CI [-.48, -.002]), and severity of hydronephrosis, rs= -0.39 (95% CI [-.59, -.14]), both correlated with earlier delivery.
  
  
  CONCLUSIONS
  Late preterm/early term delivery resulted in worse short-term postnatal renal outcomes. Unless otherwise indicated, delivery for fetal hydronephrosis should be deferred until 39 weeks.
authors: a Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology , Indiana University School of Medicine , Indianapolis , Indiana , USA.
authors: Tara
authors: T
authors: Benjamin
authors: b Department of Obstetrics and Gynecology , Indiana University School of Medicine , Indianapolis , Indiana , USA.
authors: Rhiannon R
authors: RR
authors: Amodeo
authors: a Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology , Indiana University School of Medicine , Indianapolis , Indiana , USA.|c Division of Clinical Pharmacology , Department of Medicine, Indiana University School of Medicine , Indianapolis , Indiana , USA.
authors: Avinash S
authors: AS
authors: Patil
authors: d Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology , NorthShore University Health System, University of Chicago , Pritzker School of Medicine, Evanston , Illinois , USA.
authors: Barrett K
authors: BK
authors: Robinson
mesh_terms: D000328:Adult; D002585:Cesarean Section; D005260:Female; D047109:Fetal Development / Q000502:physiology; D005865:Gestational Age; D006801:Humans; D006869:Hydronephrosis / Q000196:embryology / Q000503:physiopathology*; D011183:Postoperative Complications / Q000209:etiology; D058536:Pyelectasis; D013997:Time Factors
keywords: Fetal hydronephrosis; delivery timing; pelviectasis; pyelectasis