4 month old baby girl diagnosis Duplex of the left kidney. At 7 months old we rushed to hospital with fever and after Blood, urine, e-ray,and ultrasound tests we were diagnosed with a UTI. The ultrasound was foggy so a month later after infection subsided we had another ultrasound which shows Left Kidney Duplex. She has been on Septra since the first hospital visit. We are now being referred AGAIN by my family doctor for further testing. She hasnt had any other episodes and seems like she is thriving as well as any other healthy baby. I guess my question is a). In clear terms, what could I expect as far as any complications or other problems that could arise other than future UTI s. And, will she ALWAYS have to be on an antibiotic???