Fetal atrial septal bulging tumor does not require induction of labor. If the atrial septal bulging tumor is large or combined with atrial septal defect, surgery is required after birth. Fetal atrial septal bulging tumor is not a tumor, it is a part of the atrial septum between the left and right atria that is weak or loose, due to the difference in loading pressure between the left and right atria, resulting in the atrial septum bulging out to the side with low pressure in the form of a tumor. If the atrial septal bulge is small, there are usually no obvious symptoms, and the fetus does not affect normal life and learning after birth. As the baby ages, the tumor may disappear, and regular checkups after birth are sufficient. If the atrial septal bulging tumor is large or combined with atrial septal defect, it may cause arrhythmia or cerebral thrombosis, which will require surgical treatment under the guidance of the doctor after the fetus is born.