24-25 weeks single live intrauterine fetus, with an obvious left-sided ureterocele (5 mm size) without hydronephrosis in the left kidney, giving "bladder in bladder" appearance. This requires monitoring to check the development of left-sided hydronephrosis or bladder outlet obstruction. Follow up ultrasound should be done in antenatal as well as postnatal period (2nd week postnatal).