Bilateral renal pelvis separation of 5 mm at 24 weeks is a physiological manifestation, no need to worry too much, regular obstetric examination can be. Bilateral renal pelvis separation of 5 millimeters at 24 weeks is a physiological manifestation. Under normal circumstances, renal pelvis separation of less than 10 millimeters is a physiological manifestation, in this case, only need to review the ultrasound regularly to monitor the width of renal pelvis separation. If it is more than 10 millimeters, it is necessary to review regularly and closely observe the hydronephrosis. If the bilateral renal pelvis separation is greater than 10 millimeters or more, and there are also other ultrasound indicators of abnormality, amniocentesis should be carried out to rule out any problems with fetal chromosomes. When the fetal bilateral renal pelvis separation of 5 mm at 24 weeks, it is recommended to go to the hospital in time to consult a professional doctor to make a judgment, and follow the doctor’s instructions for obstetric examination.