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I suggest you read the following from the WJM (Western Journal of Medicine). It provides a section on the study of air travel with airline stewardesses.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1306375/
Page 482. Section "Menstrual Disorders in Miscellaneous Conditions".
It appears problems resolve over time, but could be related to the stress of travelling.
What else can I help you with?
What is heavier cold or warm air?
Cold air is heavier
What is the difference between 0.22 caliber and 0.17caliber air gun?
The .22 fires a pellet that is larger in size, and heavier. Being heavier, it carries more energy, and will travel a greater distance.
Which is heavier- football with full air or with no air?
A football with no air is heavier than a football with full air because the air adds buoyancy and makes it lighter.
Are solvents heavier than air?
Yes solvents are heavier than air
Is Nitrous Oxide lighter or heavier than air?
Nitrous Oxide is heavier than air.
Is argon heavier then air?
Yes, argon is heavier than air. Argon has a higher density than air, so it will sink below the air in the atmosphere.
What is heavier than air flying craft?
"Heavier than air" refers to airplanes.
Why are aircraft categorized into heavier-than-air and heavier-than-air vehicles?
One is lighter and the other one is heavier. :D
Which is a heavier-than-air flying craft?
An airplane is a heavier than air flying craft
Is LP gas heavier than air?
Yes, LP gas is heavier than air.
What kind of air is heavier than another type of air?
Gas is heavier than oxygen. Cold air is heavir than hot air
Which craft is a heavier-than-air flying craft?
An airplane is a heavier than air flying craft
