CT plain radiography performed during ovulation has no significant effect on the baby, and studies have shown that a single X-ray or CT plain radiography during pregnancy is not harmful to the fetus. Clinical data show that the minimum radiation exposure dose required to cause adverse fetal outcomes is 50-200mGy, and the fetal radiation exposure dose of commonly used clinical X-ray and CT examinations is 0.0005-0.01mGy and 0.01-0.66mGy, which is much lower than the teratogenic dose, so no matter whether it is a pre-pregnancy or a CT scanning examination during pregnancy there is no obvious effect on the baby. In daily life, there are many pregnant mothers who terminate their pregnancy because they have X-ray or CT without knowing it, which is not recommended. For the time being, radiation imaging should be avoided during pregnancy, especially during early pregnancy. For women who have had X-rays or CT scans, it is recommended that they consult a specialized obstetrician if they have any concerns.