When a woman is 3 months pregnant, she can fly if she is healthy in all aspects of her body. But if the woman’s body itself is relatively weak, it is best to avoid flying. 1, the embryo is in an unstable state: the first three months of pregnancy for the early stages of pregnancy, the embryo is in an unstable state. Due to the airplane takeoff, landing, or crossing the clouds when the bumps are relatively large, and travel fatigue, etc., easy to cause pregnant women to miscarry; 2, early pregnancy reaction: early pregnancy by the body’s hormonal influence will appear drowsiness, nausea, vomiting, and so on. There will also be a loss of appetite, anorexia and other symptoms, this stage by plane, the ups and downs of the plane will stimulate the stomach and intestines, easy to make the pregnancy reaction aggravated; 3, palpitations, dyspnea and other discomforts: inside and outside of the aircraft will produce a difference in atmospheric pressure, the pregnant woman may be due to a lack of oxygen and produce palpitations, shortness of breath, breathing difficulties, dizziness and headache and other discomforts, the serious case will affect the condition of the fetus in the uterus, the occurrence of miscarriage with omen and other conditions. Pregnant women who need to take an airplane during pregnancy should try to avoid the first three months of pregnancy and the last three months of pregnancy. When traveling by plane, you can first go to the obstetrics department for a checkup, and you can travel by plane 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 brace to support their necks when flying to minimize discomfort during the trip.