It is necessary to check ultrasound and genetic testing to determine whether the fetus inherits polycystic kidney. Polycystic kidney is a hereditary disease. Its pathologic changes are due to the occurrence of numerous retention cysts in the renal parenchyma on both sides. Polycystic kidney is categorized into infantile type and adult type, both are autosomal inherited disease, infantile type is autosomal recessive inheritance, adult type is autosomal dominant inheritance, adult polycystic kidney patient’s children have a 50% chance of getting the disease. 1. Ultrasound: Usually, the sensitivity and specificity of this examination is high, and it can be examined with the help of color ultrasound during the fetal period. If the fetus is found to have multiple cystic changes in the kidneys, family history should be asked. If the parents have this disease, then the fetus is very likely to get this disease. 2. Genetic test: Generally, the test can clarify whether there are abnormal genes or not, and can also determine the type of the disease, mostly used for prenatal diagnosis and atypical pathology. It is recommended to actively cooperate with doctors to determine whether the fetus inherits polycystic kidney through the above tests and take relevant measures in time.