Book excerpt: The management of medical disorders in pregnancy has undergone significant changes in the recent years. The pattern of disease has changed with improvements in socio-economic conditions. For example, the incidence of antenatal anemia has decreased progressively in the past few decades, and pulmonary tuberculosis (which used to be prevalent) is now seen only rarely. Chronic rheumatic heart disease has also become less common. On the other hand, gestational diabetes has become more common. This may be due partly to the setting up of screening services for gestational diabetes in many hospitals. The four most common medical disorders complicating pregnancy are anemia, diabetes mellitus, cardiac disease, and thyroid disorders. In addition, because of the improvements in the medical, obstetric, and anesthetic management of pregnancy, many women with medical disorders can go through a pregnancy without major problems. There has also been a progressive decrease in the perinatal mortality associated with some medical disorders, such as diabetes. It is important for all healthcare professionals involved in the management of pregnant women with medical disorders to be conversant with the latest developments in order to provide the best care to these women. The chapters in this issue are certainly helpful in this respect. The eminent authors for the various chapters have discussed the various options available describing in detail their experiences regarding the various aspects of the condition.