Perinatal depression is described as the depression during pregnancy, around childbirth or within the first year post‐partum. This book encompasses significant information regarding the epidemiological, biological, psychological and clinical facets of common mental disorders during pregnancy and in the postnatal period. The topics encompassed in this book include: comprehending the effect of anxiety and depression during pregnancy and in the postnatal period; recognizing postnatal depression with the help of distinct instruments at the right time, which is extremely crucial in order to avoid the negative impacts on the children of depressed mothers; epidemiological information regarding perinatal mental health complications among minorities, such as immigrant population and underserved rural women; biological aspects of perinatal depression and anxiety. The issue of postnatal depression in men, which is commonly ignored, has also been discussed in this comprehensive book.