You could always ask at your first OB appt (Which I'm guessing you haven't had yet at only 5 weeks). I am flying to London in my first Tri, for two weeks.
As long as it's between OB appts, I dont see what the problem is. It is obviously discouraged in your last trimester.
Last time I got PG OB told me that the only reason you might not want to fly is becuase (god forbid something happens (read "you miscarry") you won't be in the airplane or at some random hospital. 11-12 weeks is practically 2nd trimester so I wouldn't worry bout it at all. HAVE FUN!
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I'm flying to Europe next week (I'm only 6 weeks) and the doctor was ok with that, just recommended that I get up each hour and walk around on the plane. I'll also be flying again to Florida around week 10..so I'm sure you'll be fine!
I just did a 14 hour working flight (cabin crew) and although I was exhausted its pretty safe (unless you have complications) I have my last working trip tomorrow and that is due to company policy - I will however continue to fly to see my family - I live abroad and they are in the UK! Cabin Crew are fully trained to deal with such things as Births and Miscarriages (although I would not wish that upon anyone) it is reassuring to know - also if you inform them that you are pregnant and have a bottle of water they are more willing to fill it up!
Re: thoughts on flying during first tri (around 12 weeks)
You could always ask at your first OB appt (Which I'm guessing you haven't had yet at only 5 weeks). I am flying to London in my first Tri, for two weeks.
As long as it's between OB appts, I dont see what the problem is. It is obviously discouraged in your last trimester.
Have fun!
Unless you are under doc orders not to fly, you should be fine.
I've been grounded until I deliver, but I have a sucktastic history.
TTC #1 since May 2010. BFP #1 - 5/31/10; m/c on 7/22/10
Started seeing RE in August 2011
5 IUIs: BFN; IVF #1 - Success! BFP - 7/25/12
My Chart My Nest Bio
It's absolutely fine. I worked with several women who (with their doctors consent) flew until their due date.
have fun