1Nguyen HT,Hemdon CD,Cooper C,et al.The Society for Fetal Urology consensus statement on the evaluation and management of antenatal hydronephrosis.J Pediatr Urol,2010,6:212-231. 2Mallik M,Watson AR.Antenatally detected urinary tract abnormalities:more detection but less action.Pediatr Nephrol,2008,23:897-904. 3Ek S,Lidefeldt KJ,Varricio L.Fetal hydronephrosis;prevalence,natural history and postnatal consequences in an unselected population.Acta Obstet Gynecol Scand,2007,86:1463-1466. 4Toiviainen-Salo S,Garel L.Grignon A,et al.Fetal hydronephrosis:is there hope for consensus.Pediatr Radiol,2004,34:519-529. 5Siemens DR,Prouse KA,MacNeily AE,et al.Antenatal hydronephrosis:thresholds of renal pelvic diameter to predict insignificant postnatal pelviectasis.Tech Urol,1998,4:198-201. 6Mandell J,Blyth BR,Peters CA,et al.Structural genitourinary defects detected in utero.Radiology,1991,178:193-196. 7Finnell SM,Carroll AE,Downs SM.Subcommittee on Urinary Tract Infection.Technical report-Diagnosis and management of an initial UTI in febrile infants and young children.Pediatrics,2011,128:e749-70. 8Game E,Loane M,Wellesley D,et al.Congenital hydronephrosis:prenatal diagnosis and epidemiology in Europe.J Pediatr Urol,2009,5:47-52. 9Ismaili K,Avni FE,Wissing KM,et al.Long-term clinical outcome of infants with mild and moderate fetal pyelectasis:validation of neonatal ultrasound as a screening tool to detect significant nephrouropathies.J Pediatr,2004 ,144:759-765. 10Wheeler DM,Vimalachandra D,Hodson EM,et al.Interventions for primary vesicoureterie reflux.Cochrane Database Syst Rev,2004,(3):CD001532. 11Corteville JE,Gray DL,Crane JP.Congenital hydronephrosis:correlation of fetal ultrasonographic findings with infant outcome.Am J Obstet Gyneeol,1991 ,165:384-388.