Good evening doctor, i am sagunthala ,i felt back pain in left kidney,Doctor suggested me IVP test and IVP report showed that partial left pelviureteric junction obstruction causing grade 3 hydroureteronephrosis and prompt contrast excretion from both kidneys.Doctor reported me go for surgery.What is the problems with that, if surgery is necessary or any other test is required or due to prenatal PVJ or due to pregnancy.please suggested your answer.