Harvey Neil Karp, FAAP (born 1951) is an American pediatrician, author, and child development specialist. He is best known for his book "The Happiest Baby on the Block" and its accompanying DVD, that use his "5 S's" approach to infant care. He is also the creator of the Snoo, a smart bassinet. He is an Assistant Professor of Pediatrics at the Keck School of Medicine at the University of Southern California and a fellow of the American Academy of Pediatrics. Career From 1982 to 1984 Karp practiced pediatrics with pediatrician Paul Fleiss in Los Angeles, California. He then opened his own practice in Santa Monica, where he continued to see patients until 2005. He was assistant clinical professor of pediatrics at the UCLA School of Medicine from 1989 to 2009, where he served as pediatric liaison to the Child Abuse Team. He appeared as a regular contributor to the Lifetime cable television show Growing Up Together from 1990 to 1992. In 2009, he became an assistant professor of pediatrics at the USC Keck School of Medicine. Karp is a founding board member of Healthy Child Healthy World, and has served on the advisory boards of the Green Guide, Babycenter.com, Parents, Ser Padres, and American Baby magazines. Infant calming and sleep technique Karp's infant calming technique is supposed to be based on recreating elements of life in the womb. Human babies, according to Karp, are born less developed than other mammals. Karp calls the first three months of life the "fourth trimester." Karp hypothesizes that all babies are born with a "calming reflex" that quickly relaxes most fussy babies when they are stimulated in a way that resemble sensations that babies experience in the womb. Karp calls the ingredients of his method for soothing young babies the "5 S's": tight swaddling, side/stomach position, shushing, swinging and sucking. Regarding sleep, Karp recommends nightly swaddling and sound and motion sleep cues to help babies establish a circadian rhythm and to promote infant sleep. Snoo Bassinet In 2016, Karp's Happiest Baby Inc. launched an internet-connected bassinet called Snoo. The Snoo claims to automate the principles of Happiest Baby on the Block. The device uses sensors to listen for a baby’s cries and adjusts the level of white noise volume and motion of the sway accordingly. The product was designed with Swiss designer Yves Behar. The device retails for $1,595 in the United States. About