During prenatal check-ups for fetuses diagnosed with Tetralogy of Fallot, the condition can be detected. A four-dimensional color Doppler ultrasound can be performed in the mid-pregnancy stage, allowing observation of the fetus's development, such as the brain, kidneys, skeleton, and heart. Therefore, using four-dimensional color Doppler ultrasound checks can identify congenital heart diseases. When Tetralogy of Fallot is diagnosed, deciding whether to continue with the pregnancy or terminate it is a major concern for the pregnant woman. Cardiac malformations in the fetus can also be surgically treated after birth.