Fetal right kidney ectopic to above the bladder may be congenital ectopic kidney, or it may be caused by the angle of measurement, which needs to be analyzed specifically. 1. Congenital ectopic kidney: During embryonic development, the fetus can develop an ectopic kidney due to impaired growth of the ureteric buds, abnormal blood supply, and overgrowth, which can lead to ectopic kidney, making it ectopic over the bladder. 2. Measurement angle: Since the position of the fetus in the uterine cavity is changing, the measurement cannot be seen completely clearly, resulting in measurement error and the result of ectopic right fetal kidney over the bladder, it is recommended to review again. Fetal right kidney ectopic to above the bladder may also be related to other causes, it is recommended to communicate with the relevant doctors, review the ultrasound to clarify the cause and proceed to the next step of treatment.