All systems of the body undergo major changes during pregnancy. The aim of this book is to describe the physiology of these changes and how understanding them is relevant to the care of the pregnant woman. The volume is organised by body systems and describes in detail the physiology of pregnancy including the findings of the latest research. Good evidence based clinical practice in obstetrics depends on a sound understanding of relevant physiology. This book will provide invaluable background to all obstetricians in training and practice; it should also be consulted by physicians who care for pregnant women and those working in the physiology of this area.