Whether or not a belly band is necessary for pregnant women needs to be decided according to the pregnant women’s own physical condition. If the pregnant woman herself is in good physical condition, her abdominal muscles are well developed, her pelvic floor functions well, and she is able to support the weight of the fetus, then there is no need for a lap-band. However, if the pregnant woman is thin and weak, the abdominal muscles are weak, with the growth of the fetus appear rectus abdominis muscle separation or pubic symphysis separation, resulting in abdominal or pubic bone pain, it is necessary to use a lap-belt to relieve the pressure on the abdomen, to alleviate the pain of pregnant women. Generally, the abdominal support belt will be used in the second trimester to relieve the pain caused by the pressure, but also to help the fetus maintain a normal fetal position. However, if the belly band is tied too tightly, it will lead to a decrease in abdominal volume and increase the pressure in the uterine cavity, which is not conducive to the growth of the fetus. Therefore, it is necessary to use a lap-band for pregnant women who suffer from pain due to pressure, as well as for those who have adjusted the position of the fetus.