If you are a greencard holder and your baby is born outside the US your baby may obtain permanent resident status upon return to the US with you, but not citizenship. If your baby is born in the US it will be a US citizen, even if you are still a greencard holder. There are a lot more details than can be covered here - you should set a consultation to fully explore your options and the consequences of your decisions.
Answered on Sep 25th, 2012 at 4:39 PM