Hemorrhage and thrombosis are major hazards for pregnant women and their newborn infants. This book is concerned with the developmental mechanisms, the diagnosis and treatment, as well as the prevention of these hemorrhagic and thrombotic disorders. The topics discussed in this volume, (1) perinatal hemorrhage in mothers and their offspring; (2) coagulation disorders complicating pregnancy; (3) neonatal intracranial hemorrhage; and, (4) vitamin K deficiency in the neonate, will help bridge the gap between basic scientists and clinicians and between the pediatri- cian and the obstetrician. Hopefully, all those concerned with preventing these disorders will be stimulated by the information and questions raised in the fol- lowing presentations. Acknowledgements We wish to thank Professors Takeshi Abe (Vice President, Teikyo University), Nobuyoshi Shinagawa (Hirosaki University), Hiroaki Soma (Tokyo Medical College), Tamotsu Miyazaki and Keisuke Sakurada (Hokkaido University) for their helpful advice. SHIGENORI SUZUKI WILLIAM E. HATHAWAY JOHN BONNAR ANTON H. SUTOR SHIGENORI SUZUKI. * 1936 in Sapporo, Japan. M.D., Uni- 'versity of Hokkaido, 1963. Lecturer, Hokkaido Univer- sity, 1974. Alexander Humboldt-Foundation Scholarship, Free University of Berlin. University of Munich, 1974- 1976. Foriner President, Japanese Society of Obstetrical, Gynecological, and Neonatal Hematology. President of International Symposium on Perinatal Thrombosis and Hemostasis (1989 Sapporo). Professor, College of Medi- cal Technology affiliated with Hokkaido University since 1983. WILLIAM E. HATHAWAY. * 1929 in Oklahoma, USA.