When I was pregnant with my first child I was enamored of the idea of using a midwife. I hired a seasoned professional named Lorna. But my son was breech and arrived via a scheduled C-section, so Lorna was replaced by an anesthesiologist, a surgeon, and a floating sea of faceless, masked nurses. I was disappointed that our preparations had been for nothing. Until I awoke one morning, groggy from morphine, to hear her arguing in the hallway with the pediatrician. She was refusing to let him give my son a shot that we hadn’t discussed.