Pregnancy said waist circumference is also abdominal circumference, pregnancy 38 weeks pregnant women abdominal circumference normal range is not good to determine the individual differences, generally normal pregnant women in pregnancy after 20 weeks weekly abdominal circumference increase of no more than 1.5cm. Pre-pregnancy basic abdominal circumference to determine whether the growth of abdominal circumference during pregnancy is normal, generally normal pregnant women after 20 weeks of pregnancy weekly abdominal circumference increase of no more than 1.5cm, late pregnancy abdominal circumference growth is relatively slow. Generally throughout pregnancy abdominal circumference growth is a slow process, depending on individual differences, based on abdominal circumference growth alone can not determine whether the normal development of the fetus, need to be based on regular obstetric examination of the uterine height of the growth of the situation as well as ultrasound examination to determine whether the normal development of the fetus. It is recommended to go to the obstetrics and gynecology department of the hospital regularly after pregnancy to determine whether the growth of abdominal circumference and uterine height is normal, and then ultrasound to determine whether the development of the fetus is normal or not, and to consult the doctor in time if there is any abnormality.