The human heart definitely worths appreciating. It is the absolute favorite anatomical organ to look at. This poor little heart never got to beat outside of the womb. It is incredible to think how his little heart, that fits in the palm of a hand, is responsible for keeping a fetus alive. The fetal coronary arteries are quite different. Conditions such as fetal growth restriction, anemia, ductus arteriosus constriction and bradycardia are associated with evidence of enhanced coronary blood flow. These findings suggest that short-term autoregulation and long-term alterations in myocardial flow reserve are present in the human fetus. Evaluation of the coronary arteries is primarily achieved by color flow imaging and pulsed wave Doppler.