“I delivered twenty babies in the summer of 1977. I was hardly more than a baby myself, just turned twenty-four and starting my third year of medical school.” So began Mark Sloan's three-decades-long exploration of the wonders and oddities of human childbirth. Pediatrician, husband, and father, the author has attended nearly three thousand births since that long-ago summer, encountering everything from routine deliveries to tense labor-room dramas. In Birth Day, Sloan draws on his personal and professional experience to weave the strands of memoir, history, science, and culture into a fascinating-and often funny-tapestry of this fundamental human passage. Some of Birth Day's many topics include: ¿ The first five minutes of life-scuba divers, astronauts, and the amazing adaptations that transform a fetus into an air-breathing, out-in-the-world baby. ¿ Cesarean section-a look at its origins, its future, and how it came to be the most frequently performed operation in American hospitals. ¿ The five senses at birth-does light enter the womb? How loud is it in there? What is a newborn baby searching for with those first anxious glances?