The normal value for the width of the lateral ventricle on the right side of the fetus is ≤1.0 cm, so 0.85 cm is normal and does not need to be corrected. The normal width of the right and left lateral ventricles of the fetus is about 1.0 cm, and the average value is about 0.7 cm. If the width of the lateral ventricles is greater than 1.0 cm, it is considered widening of the lateral ventricles, which may cause other abnormalities, such as chromosomal abnormalities, and continuation of the pregnancy in this case is not generally recommended. The measurement of the width of the lateral ventricles of the fetus generally includes two methods, the first being nuclear magnetic examination and the second being prenatal ultrasonography. Once the widening of the lateral ventricles is observed on ultrasound, it is necessary to pay attention to the presence of other abnormal symptoms in the child, and it is usually necessary to check the genes as well as the chromosomes, and once the diagnosis is confirmed, it is necessary to treat it aggressively. In addition, the consequences of fetal lateral ventricle widening are often more serious, and pregnant women are advised to take it seriously. Pregnant women should follow the doctor’s instructions to do a proper maternity test. If fetal malformations are detected, it is recommended to go to a regular hospital for eugenic counseling as soon as possible and follow the doctor’s instructions for treatment.