Well we didn't have any problem, and as far as I can remember, she went for the x-rays after baby was born and after the 6th week examination apt. because she wanted to ask the obstetritian before having the x-rays, in order to have really clear that this wouldn't affect the baby because she was breastfeeding, the medicals arent that complicated, so obviously everything was fine, dont worry, everything should be good, they have to understand that we all are ppl, right?, and is more important your wife and baby's safety. That was our experience, but in case you are not sure at all, you can always send a fax to your immigration office and ask those guys what would it happen. So good luck