Genetic counselling is widely accepted as an integral part of the management of every patient with an inherited disorder, and the rapid developments in human and medical genetics have reinforced the importance of competency in risk calculation. Fully updated since the first edition (1991) this book provides a simple introduction for risk calculation for genetics counselling,, describing how risks can easily be estimated or calculated for most counselling situations. Easy-to-use, with worked examples, this book covers all patterns of inheritance. In this second edition, Introduction to Risk Calculation for Genetic Counselling now includes a chapter on cancer genetics, and there are also new sections on anticipation, gonadal mosaicism, the potential use of susceptibility loci, three-way chromosome translocations and meiotic drive. Reviews of the first edition: 'This is a good book' American Journal of Human Genetics 'I would recommend this book to any clinicians involved in aspects of genetic counselling' Genetical Research Introduction to Risk calculation for Genetic Counselling.. 'is simple, clear and accurate.' 'There is no doubt that this will be a popular book.' Journal of Medical Genetics 'Introduction to risk calculation in genetic counselling more than fulfills its aim to be a user-friendly introduction to risk calculation.... For those involved in the delivery of genetic counselling services. It is clear in style, with worked example, and all within 150 pages.' BMJ 'This new text is to be welcomed as it is readily accessible to the majority of clinicians and is, in essence, a book that should be in the working bookshelf!' Neuromuscular Disorders