Three-dimensional (3D)/four-dimensional (4D) ultrasound has profited greatly from the developments in computer and 3D probe technology. It has become such a sophisticated technique in the fields of prenatal diagnosis, gynecology, and breast diagnosis that it is indispensable for the skilled ultrasound operator. It represents a problem-solving tool in different circumstances, not only in the demonstration of pathological findings, but also in the verification of normal findings. This is particularly important in obstetrics in patients with an increased risk for a specific fetal malformation. In such a situation, the parents-to-be can easily be reassured by being shown the normal fetal anatomy. On the contrary, with the ability to demonstrate the fetus to the parents-to-be as in a photograph, there may be a risk that they believe 3D ultrasound to be able to detect any possible defect and can thus guarantee the “perfect baby.” However, this would definitively be the wrong conclusion.