Obesity is the common health issue in current era. It is defined as the condition of accumulation of excess fat in the body which in turn shows adverse effects on health. Obesity is calculated in terms of Body Mass Index (BMI). BMI is measure of fat based on height and weight of an individual. A person with BMI 25-29.9 kg/m2 means he/she is overweight. In terms of BMI, Obesity can be defined as the condition of having BMI greater than 30 kg/m2. Obesity is divided into three classes which include: Class I (BMI-30-34.9 kg/m2), Class II (BMI-35-39.9 kg/m2) and Class III (BMI-40 and above). In the current era, due to lack of physical exercise and proper diet, people are prone to obesity. Women during pregnancy are more susceptible to Obesity. This condition is known as Maternal Obesity. It is one of the major risk factor in Obstetric practice. It may result in negative outcomes for both mother as well as the foetus. Obesity in Pregnancy may result in serious health conditions like Gestational diabetes and Preeclampsia. It may also result in future health problems for both mother and child. Inorder to prevent the risk of Maternal Obesity, one must follow nutritional diet from the first trimester.