Fetal intracranial structural disorders may be caused by drug stimulation, radiation, malnutrition, consanguineous marriage and so on. 1. Drug stimulation: During pregnancy, pregnant women take certain stimulating drugs or antibiotics, which affect the growth and development of the fetus and may lead to fetal intracranial structural disorders. 2. Radiation: Pregnant women who are exposed to radiation for a long period of time may also cause intracranial structural disorders in the fetus. 3. Nutritional deficiencies: If a pregnant woman does not take enough vitamins or minerals during pregnancy, the fetus lacks the relevant nutrients, which may lead to abnormal development of the intracranial structures of the fetus. 4. Marriage between close relatives: Genetic problems may lead to intracranial structural abnormalities. If the fetus has intracranial structural disorder, it should seek medical treatment in time and take relevant measures under the doctor’s advice.