This book explains and reviews some of the significant events involved in human implantation and the establishment of the placenta in the uterus. This critical phase in human reproduction has proved to be an elusive and challenging area of research, not least because of the immunological and genetic interactions between the mother and fetus. The volume focuses on the most recent advances in our understanding of the basic mechanisms involved, with particular emphasis on cell biology and immunology. Although there are still gaps in our knowledge, the authors have succeeded in producing a timely, coherent and stimulating account of this subject. This lucid volume will benefit all those studying or undertaking research in reproductive biology and immunology, perinatal pathology, fetal medicine and obstetrics.