If there are no special conditions for the pregnant woman and the fetus after pregnancy (after hospital examination and evaluation), you can fly until 36 weeks of pregnancy. The best time is from 14 to 28 weeks of pregnancy, i.e., the middle of pregnancy, when the baby’s development is stable, the risk of miscarriage and premature birth is minimal, and the pregnant woman is in the most relaxed stage of her entire pregnancy. Pregnant women who are newly pregnant need to know the following information when flying. The more concern about airplane travel, the more pregnant women are concerned about the radiation of airport security equipment, cabin pressure, high altitude rays, and the impact on the fetus and pregnant women during the journey. The radiation level of airport security equipment is low and not enough to cause harm to the fetus. The pressure in the cabin itself has no obvious effect, but the oxygen content in the air is less than that on the ground, so if the pregnant woman herself is in good health, there will be no effect, but pregnant women with severe anemia or respiratory diseases may have difficulty breathing. The level of radiation in high altitude is slightly higher than that on the ground, but it is not enough to cause harm to the fetus. The flight process is generally smooth, but there will be bumps if there is airflow, but the magnitude is generally not large and the time is not long enough to cause discomfort to pregnant women. It is recommended that pregnant women choose the middle of the plane near the corridor, as the middle of the plane is more stable and near the corridor is convenient to get up and move around, pay attention to wearing loose clothing as much as possible during the journey, drink more water, pay attention to rest, balanced diet and appropriate activities. Pregnant women who are just pregnant are in the early stage of pregnancy, which is a critical time for the development of the embryo and fetus, and pregnant women generally have obvious early pregnancy reactions, so it is recommended that it is best not to travel far to avoid accidents. Pregnant women with the following conditions: tendency to miscarriage, cervical insufficiency, previous history of miscarriage and premature birth, poorly controlled diabetes and hypertension should not risk traveling far.