Ovarian Hyperstimulation Syndrome (OHSS) is a condition that can occur in women undergoing in vitro fertilization, after having follicle stimulation hormone (FSH) injections to stimulate egg growth and maturation. Some patients respond excessively to the drug and dose given and moderate to severe OHSS requires admission to a hospital. Botros Rizk, one of the world's top experts on managing OHSS, reviews in depth the important classification, epidemiology, pathophysiology, complications and prediction, prevention and treatment options for this pathology. This book is intended for infertility specialists, reproductive medicine specialists and assisted reproduction specialists.