I am a British citizen married to a American and currently hold a green card and living in the states but I'm hoping to have a baby but would like to go back to England to have the child, what would I have to do to bring my child back to the us? And is that possible for me to do that?

No problem... after the baby is born, you and your husband must contact the nearest US consulate to report birth of US citizen overseas. Bring British birth certificate and marriage registration, passports.

The baby will be issued a US birth certificate, after that obtain US passport. Then you and your husband can bring the baby back to US.