Whether or not a woman can fly after pregnancy depends on her own, generally early and late pregnancy is not suitable for air travel. In the early stage of pregnancy, the embryo has just been laid, and the connection between the fetus and the mother is not firm, so the third month of pregnancy is the period when miscarriage is most likely to occur. In addition, most people will have gastrointestinal reactions due to the bumpy airflow during the takeoff and landing of the plane, and the early pregnancy reaction of pregnant women will induce vomiting. In the late stage of pregnancy, that is, after 28 weeks of pregnancy, because of the change of air pressure at high altitude, it may cause the uterus to contract and cause premature rupture of fetal membranes. In addition, when pregnant women fly, they are in a small space for a long time, so their blood circulation is slow, which may increase the chance of venous thrombosis in the lower limbs. Pregnant women need to have a maternity checkup 2 weeks before flying to understand their physical condition and to clarify whether they can fly. Pregnant women in the process of flying, must prevent falls and collisions, always fasten the seat belt during the journey, such as leg discomfort, need to massage the leg muscles, appropriate walking, is conducive to improving blood circulation.