Got file no. in July 2003 NiuniuFeng2003-12-10 22:27:00

I'm pregant and will deliver my baby in U.S. in May 2004. Questions: 1)I have to mail documents about my baby? 2) If so, my baby has to give up U.S.citizen 3) If not, how apply for my baby about canada green card and give up U.S. Thank you!