Air travel during pregnancy do not cause any problems to the mother and the child. Certain conditions in pregnancy, such as severe anemia, sickle cell disease, clotting disorders and placental insufficiency, can increase the risk of problems.
Mid pregnancy (14 to 28 weeks) are the best time for air travel since the risks of abortions and preterm labor is low. Your health care provider may restrict travel of any type after 36 weeks of pregnancy or if you're at risk of preterm delivery.
When you fly:
Women who are concerned about air travel during pregnancy often worry about air pressure and cosmic radiation at high altitudes, but these issues aren't usually problematic. Decreased air pressure during flight may slightly reduce the amount of oxygen in your blood, but your body will naturally adjust. And although radiation exposure increases at higher altitudes, the level of exposure for the occasional traveler isn't a concern.