Birth Defects was written for healthcare workers who look after individuals with birth defects, their families, and women who are at increased risk of giving birth to an infant with a birth defect. Special attention is given to: * modes of inheritance * medical genetic counselling * birth defects due to chromosomal abnormalities * single gene defects * teratogens * multifactorial inheritance This book is being used in the Genetics Education Programme which trains healthcare workers in genetic counselling in South Africa.