Fetal cranial MRI operates as a non-invasive test in which the pregnant woman enters the MRI machine to do the test. Before the examination, the pregnant woman needs to remove any metal objects on her body, wear loose clothing, fast for more than 4 hours, and empty her bladder before the examination. Due to the individual differences of the fetus and placenta, there is no uniform and fixed scanning baseline and frequency direction during the examination, and the scanning is generally positioned according to the area to be observed. During the examination, the pregnant woman needs to take a supine position, feet first into the MRI instrument, hands up, arms crossed holding the head for testing. Fetal cranial MRI is mainly used in cases where the fetus may be suffering from spina bifida, anencephaly, intracranial space-occupying lesions, and other central nervous system disorders, and is designed to further clarify the diagnosis and assess the condition of the fetus. If the results of the maternity test are abnormal and fetal cranial MRI is needed, it is recommended to actively cooperate with the doctor’s guidance to improve the examination.