The normal value for the left and right lateral ventricles of a fetus is usually less than or equal to about 10 mm. The average is about 7 mm. A lateral ventricle wider than 10 mm is called a widened lateral ventricle, and in combination with other abnormalities, such as chromosomal abnormalities, it is usually not recommended to continue the pregnancy. There are two types of tests that can be performed: first, prenatal ultrasound and second, MRI. If you do find out that you have a wide lateral ventricle during the ultrasound, you should pay attention to whether there are other abnormalities, and it is best to check the genes and chromosomes. If the diagnosis is confirmed to be a wide lateral ventricle, we should actively cooperate with the doctor to do a series of treatment measures, and try not to drag on, or else other conditions will arise, and the fetus with a wide lateral ventricle should go for treatment as soon as possible after birth.