It is very possible that i am pregnant and In my job i frequently enter into hypobaric chambers (as an instructor)....even though I am always hooked up to oxygen, i know the the effects of the low atmospheric pressure on the body (gases expanding, decompression (which i have had), barotrauma, hypoxia, etc.) but i am not quite sure what would happen to a fetus or my womb if i was indeed pregnant. So my question is, is it safe for me to go inside if i MIGHT be pregnant or should i tell my boss that i cant until i know for sure (which would be bad.....) Two of our instructors are out of the country and I HAVE to go in this week.....if we cancel it will be very bad... any advice would be appreciated oh and if i am preg then i am only about 5 weeks along oh and for those that don't know what a hypobaric chamber is, it is an uncompressed high altitude simulator for low atmospheric pressure. and i go up to 25,000 w/o any pressurization and sometimes do rapid decompression (go up to 8,000 ft and then in one second go up to about 23,000 ft)....i can be at high altitudes for up to and hour