After the pregnancy will be fat, mainly because of the following reasons: 1, after pregnancy, the body estrogen increase, will cause water and sodium retention in the body, so that the weight increase will be fat. 2, in pregnancy, the fetus needs to grow and develop, pregnant women in the diet to fully strengthen nutrition, may appear excess nutrition, resulting in fat accumulation, weight will also increase. 3, in pregnancy during the reduction of activity metabolism Slow down, will also gain weight. It is recommended that after pregnancy, the diet should be reasonably arranged, nutritionally balanced, in order to facilitate the normal growth and development of the fetus.