Are there certain guidelines designed for contact after the baby is born?

There are no specific, etched-in-stone parameters for this contact.  Normally, it is whatever that is agreed to between you and the birth mother and/or between you and any biological father.  Common place, however,  are pre-birth telephone contacts and/or pre-birth letter exchanges, including e-mail; obviously, face-to-face contact is encouraged and, if not done pre-birth, normally takes place at the hospital in the run-up to placement.  While these contacts almost always occur pre-birth and/or during the hospital period, there are birth mothers, along with the occasional birth father, who request another one-time, face-to-face meeting, even after birth.