Pregnant women are required to wear seat belts when traveling in a car, and there are rules about how to do so. Some pregnant women are concerned that seat belts may somehow harm the fetus in the womb, not realizing that not wearing a seat belt can do more harm to the fetus and the pregnant woman in the event of an accident. Therefore, it is recommended that pregnant women use seat belts when traveling by car, and the seat belt must be fastened in the correct way. When traveling by car, the human body in the car moves at the same speed as the speed of the car, when the car suddenly brakes, the human body under the effect of inertia will still move at the original speed, resulting in crashing into the car facilities or being thrown out of the car. Therefore, pregnant women traveling by car must fasten the seat belt, in case of accidents, the seat belt can strongly pull the pregnant woman’s body, for pregnant women and the fetus in the abdomen to provide effective protection. In order to maximize the safety factor and minimize the degree of discomfort, pregnant women can put the lumbar seat belt close to the lower part of the abdomen, around the pelvis from the pelvic cavity, tied in the position of the hip bone; shoulder seat belts can be close to the upper part of the abdomen from the middle of the breasts around. If the seat belt catches on the neck, the seat must be adjusted forward until the seat belt is positioned in a way that is comfortable for the pregnant woman. Care must also be taken to adjust the seat tilt so that the seat belt is always attached to the pregnant woman’s body. It should be noted that the lumbar seat belt and shoulder seat belt should avoid the abdominal bulge, i.e., do not wrap the seat belt around the middle of the abdomen, in order to avoid emergency braking, the seat belt in the middle of the abdomen leads to partial or total detachment of the placenta in the uterus. In addition, once you are involved in a traffic accident, you should go to the hospital as soon as possible for examination of even minor abrasions. Even if the examination result is good at that time, you still should not take it lightly. When you go home, you should closely observe the vaginal bleeding as well as the abdominal pain and fetal movement. If any abnormality is detected, contact your doctor as soon as possible for prompt diagnosis and treatment.