13 weeks to consider refers to the 13 weeks of pregnancy, the size of the stomach at this time is not limited to the scope of each woman’s degree of obesity, uterine position varies, will lead to differences in the size of the stomach. 1. degree of obesity: if the woman herself is relatively thin, abdominal fat content is relatively low, 13 weeks pregnant even if the abdomen increases, the stomach does not look very big; if the woman herself abdominal obesity, 13 weeks pregnant abdominal enlargement is obvious, there will be a significant bulge protruding, even if you wear clothes can be seen bulging abdomen. 2. Uterine position: relatively speaking, women with anterior uterus are more pregnant than those with posterior uterus, and women with anterior uterus at 13 weeks’ gestation have obvious bumps on their abdomen. Thirteen weeks of pregnancy already belongs to the middle of pregnancy, at this time the belly is normal phenomenon, need to go to the hospital regularly to do obstetrics, clear fetal development, if the fetus is too large or too small, need to be timely and appropriate treatment.