Recurrent Miscarriages (RM) & Implantation Failure (IF) have remained an enigma to clinicians and researchers. Even after ruling out all possible causative factors, 50-60% cases still remain  Unexplained . A majority of these so called  Unexplained  cases are now found to have immunological basis. This book is going into the Immunological aspects of these clinical dilemmas, demystifying the role of Immunology and Immunotherapy in RM and IF. The authors have been working in the field of Reproductive Immunology and Immunotherapy for the last 25 years and they have come out with this book combining the international studies with their own experience. The purpose of writing this book is to provide a comprehensive treatise about Immunotherapy, so that it can become an acceptable modality of treatment in cases where it is needed and is effective. The book discusses the basics in Reproductive Immunology.