Book excerpt: Immunology of Recurrent Pregnancy Loss provides doctors and immunologists with the information they need to help couples who experience recurrent pregnancy losses. Sections cover unexplained infertility, repeated in vitro fertilization, embryo transfer failures, history of second or third trimester pregnancy losses of unknown cause, or pregnancy with a history of or active autoimmune and/or alloimmune disease. Reproductive failure (RF), including recurrent pregnancy losses (RPL) and repeated implantation failures (RIF) is rather a syndrome than a disease caused by multiple etiologies, such as anatomical, endocrine, genetic, infectious, immunological, thrombotic and unexplained etiologies, hence this book strives to present the latest information. In 27 chapters, divided in 5 sections, the book introduces the current update of reproductive immunology topics in RF and provides systematic diagnostic guidelines, systemic and immune etiologies and therapeutic approaches. Provides detailed immunological background for understanding the etiology and management of reproduction failure Evaluates various immunological factors involved in the pathogenesis and management of reproduction failure Gives insights into various immunological and therapeutic approaches for reproduction failure