On this day six years ago, at the corresponding moment of this post, my son was exactly one hour old. I had delivered him (after a two-day medical dance of IV pitocin , raised and lowered doses, fetal monitors, anticipation, frustration with the stalling process of induction . . . ), and I had held him close to my heart, touching skin-to-skin after nine months of wondering what that moment would be like. Then he was whisked off to the NICU . I was too exhausted to think straight; my blood pressure too high to be calm, and yet I had no energy left to be anything but. I wondered when I would see my son next—the fact that I'd had a son took time to sink in, as we had elected to wait until birth to discover the baby's gender—and I wondered whether it was somehow my fault that he was in an incubator and not sharing my postpartum room. It turned out to be something fairly common (who knew?) with a horrible sounding name: he had a pneumothorax , a tiny air leak from the lung tissue in...