When a woman is in her third month of pregnancy, she can fly if her body is healthy in all aspects. The first three months of pregnancy are the early stages of pregnancy and the embryo is in an unstable state. As the plane takes off, lands, or crosses the cloud layer when the bumps are relatively large, and travel fatigue, etc., easily cause pregnant women miscarriage; 2, early pregnancy reaction: early pregnancy by the body’s hormonal influence will appear drowsiness, nausea, vomiting, etc.. There will also be loss of appetite, aversion to grease and other symptoms, this stage of air travel, the ups and downs of the aircraft will stimulate the gastrointestinal, easy to make the pregnancy reaction aggravated; 3, palpitations, breathing difficulties and other discomfort: the aircraft inside and outside the atmospheric pressure difference, pregnant women may be due to lack of oxygen and produce palpitations, shortness of breath, breathing difficulties, dizziness and headache and other discomfort, serious cases will affect the condition of the fetus in the womb, a preterm miscarriage and other conditions. If a pregnant woman needs to fly during pregnancy, try to avoid the first three months of pregnancy and the last three months of pregnancy. And when flying, you can go to the obstetrics department for a checkup first, and you can fly if you are healthy and have no special conditions. It is recommended that pregnant women wear loose clothing, drink plenty of water, and bring a soft pillow or neck cover to support their neck when flying to minimize discomfort during the trip.