Pediatric and fetal echocardiography is a painless imaging test that allows your doctor to evaluate heart function in infants and fetuses. In the case of a fetal echocardiogram, this is most commonly performed externally via abdominal ultrasound at 17-18 weeks of pregnancy, but may also be done via endovaginal ultrasound when the pregnancy is at an earlier stage. This testing can aid in the diagnosis of congenital heart defects including holes in the heart as well as other defects that indicate the possibility of a genetic condition such as Down Syndrome. Meanwhile, pediatric echocardiography is also most often employed to help in the diagnosis of congenital heart defects – but may be used to evaluate a heart murmur or determine how well a medical or surgical treatment is working as well. In this testing, a handheld transducer that emits painless sound wave energy is placed on the child’s chest.