Defensive medicine is a way of practicing medicine that is designed to minimize the chances of being sued. This is good … up to a point. Nobody wants to be sued. Nobody should be haphazard in their practice of medicine or follow a “she’ll be right” philosophy in their care of patients. We are all committed to the principle of “primum, non nocere” (first, do no harm). However, even careful physicians can encounter unprincipled patients and their equally unprincipled attorneys. In the current environment in the United States, the chances of being sued at least once in our careers are 70–80%, and rise to 100% in high-risk specialties like obstetrics. This means that we are practicing medicine in a potentially dangerous environment, and this has given rise to defensive medicine.