Obesity is a feature affecting nearly all life aspects. As the burden of obesity is increasing steadily, it leads to the increasing prevalence of diabetes, and most other common non-communicable diseases. A comprehensive approach for the prevention of obesity appears to constitute the most effective intervention to reduce their prevalence worldwide. In this review, we highlight pregnancy as a key period in a woman's life, which can improve compliance with different types of diet, physical activity, and behavioural programs, affecting the next generation's health, and breaking the vicious cycle of family obesity.