Excessive number of ultrasound examinations for pregnant women has almost no effect, except that care should be taken when performing ultrasound examinations during early pregnancy, which should be as short as possible, and there is no other special need for attention. Pregnant women try not to do X-ray and CT examination during pregnancy, because the rays are harmful to the pregnant woman, the fetus, in this case may produce malformation. In addition, pregnant women try to eat a light diet, small and frequent meals during early pregnancy, and maintain a comfortable sleeping position, sleeping position as comfortable as possible, other than no special need to pay attention to.