Ultrasound of the abdomen is clinically useful in determining the presence of hydrocephalus in the fetus during pregnancy. The use of 3D or 4D ultrasound is clinically recommended for the prenatal examination of the fetus. An experienced ultrasonographer can help determine the presence of hydrocephalus based on the width of its ventricular system and the specific shape of the ventricular system. Most clinical cases of hydrocephalus occur as a result of a viral infection during pregnancy or due to a lack of basic medical knowledge and drug abuse that results in damage to the fetal nervous system, leading to abnormal development of the fetal neural tube. In such cases, several examinations are required to repeatedly determine.