The New Way to Calm Crying and Help Your Newborn Baby Sleep Longer. Karp, a pediatrician in Santa Monica, Calif., and assistant professor at the School of Medicine, UCLA, offers a new method to calm and soothe crying infants. While nursing or being held satisfies some babies, others seemingly cry for hours for no reason. These babies suffer from what Karp calls the Fourth Trimester. When you bring your soft, dimpled newborn home from the hospital, you may think your nursery is a peaceful sanctuary.... To him, it's a disorienting world part Las Vegas casino, part dark closet!