Fetal kidney cysts do not require treatment and there is no effective way to treat them. The cause of fetal kidney cysts is related to genetic factors or congenital developmental abnormalities. The vast majority of cysts are benign lesions that grow very slowly. A solitary renal cyst has no significant adverse effects on the fetal health or on the health of the child after birth and does not require special treatment, and the child should be reviewed regularly after birth. If the cyst increases in size, it can be treated by surgery or puncture and fluid extraction. If multiple renal cysts occur in both kidneys, after a comprehensive assessment, it is necessary to terminate the pregnancy if it has a greater impact on the health status of the child after birth.