If you bear in mind all these aspects and you take all the right precautions, your travel by the plane will be sure. However, it is good to ask for the doctor’s advice first. There is an age limit accepted by the air lines – most of the air lines have a superior limit of pregnancy’s age, beyond which they refuse to transport a pregnant women: in general 32-34 weeks. At an age of pregnancy a little smaller (maybe over 28 weeks), the air lines companies may request a letter from your doctor which can attest that you are able to fly. These conditions are different and it is good to ask for information at the air line company.
After you are up in the air the biggest risk is that the profound thrombosis of the veins (the formation of a cruor into a vein of the leg). It is a rare complication, but a grave one. The risk of thrombosis raises by the absence of motion and dehydration. To reduce the risk of thrombosis you should try to reserve an aisle seat to have more space for your feet, drink many liquids during the fly, get up on your feet and walk a few minutes once every hour and being able to do all these things without disturbing the other passengers.
Flying during pregnancy – radiation during the fly (they have the origin into the Sun and they are caused by the deep space and they pass through the fuselage of the airplane. However, there are more studies, which demonstrate that the exposure to radiation during the fly does not present high risks to lose the pregnancy.
The dose permitted by the Nuclear Regulatory Commission from United States of America for a pregnant woman who is exposed to radiation by the work nature is of 500 millirems. What precaution measures you should take against the radiation – in this moment the specialists offer only a few advice. They sustain that during the solar explosions, when the exposure to radiation may increase by one hundred times the pregnant women must not fly.
Since you are pregnant and you plan to travel by plane, you should choose a fly at low latitude, because the fly above the polar regions involve double radiation in regard the ones above the Equator. There is a website, which offers information about the existence of solar explosions and excessive radiation associated with solar explosions.
I repeat that if you have time to choose, you should prefer the fly at low latitude and lower altitude because the level of the radiation doubles at each 2000 meters. Precisely, the jet planes, which fly at high altitude, are the ones that fly on long routes: Concorde, Boeing 747 SP, Boeing 747 – 400, Boeing 767-300 ER, Airbus A 340-200 and MD-11.