With the growth of assisted fertility techniques, multiple births are becoming more common and provide a large proportion of the work of neonatal and paediatric units. There is also growing awareness of the particular medical and social problems of twins and multiple birth children. Elizabeth Bryan is a world renowned figure in the field of multiple birth research. This book is a greatly revised and expanded edition of her previous work 'The Nature and Nurture of Twins'. New sections are included on the treatment of infertility; ethical dilemmas of reproductive technologies; care and development of higher order birth children; and the establishment of twins clinics, as well as her latest research. Unique in its coverage of all aspects of nature and nurture from conception until school entry, this book will be welcomed by all professionals working with twins and multiple birth children.