Asked to breath in when having threads checked?....

Ok so went to my gyno and had my threads checked. She said they were fine but as she was checking for them she asked me to breath in... Any idea why this might be? I know I think to much about stuff and such judt want some opinions thanks

Hello pixie. Sorry to have to ask, but what are your threads?

Threads on IUD?  If so I would guess breathing in shifts their position in some way allowing a better view by the gynaecologist

Thanks I just wanted to know it was nothing to worry about. But I guess if it had been she would've said something  

I'd guess so. In my view [or perhaps I'm just lucky these days] doctors do tend to explain what they are doing and would certainly let you know if there was something more they wanted  to explore [as it were ...]

I don't even know what threads are.  I'm from the US.  

Oops just read the other replies.  The position of them makes sense.