Since the publication of its first edition, "Breastfeeding" has been considered seminal in its field. This important text brings together an avalanche of evidence-based clinical information on all aspects of breastfeeding, from basic data on the anatomical, physiological, biochemical, nutritional, immunological, and psychological aspects of human lactation, to the problems of clinical management of breastfeeding. Increased coverage of drugs in human breast milk, advances in biochemical, nutritional, and immunologic aspects of human lactation, and a new chapter on infectious disease and breastfeeding make the fifth edition of "Breastfeeding" a critical resource for any clinician whose patients include breastfeeding women.