During pregnancy the mother’s body undergoes a series of physiological changes, her weight will increase, and her buttocks and thighs may grow fat, leading to obesity. During pregnancy, under the influence of hormones and neuroendocrine secretion, various systems in the pregnant woman’s body will undergo a series of physiological changes to adapt to the growth and development of the fetus and to prepare for the future delivery. During pregnancy, the average weight gain of a pregnant woman is 12.5kg, so her hips and thighs are likely to grow. During pregnancy, the basal metabolic rate increases and so does the total daily energy requirement and, accordingly, the need for protein increases significantly. In the case of increased intake, the mother’s fat stores will increase, and weight gain occurs, which is a normal physiological change, and it is possible to return to the prenatal level of body shape after delivery with exercise.