What type of communication is given to the adoptive parents when the birth mother delivers?

Given the dizzying and daily advancements in technology, communication these days nearly is instantaneous provided, of course, all involved parties, and primarily the birth mother, utilize the technology.  Depending on the specific relationship you and the birth mother may establish pre-birth, it may be you who is alerted directly by the birth mother that she, in fact, is at the hospital or on her way to the hospital.  Otherwise, your adoption professional will contact you, the timing of which could be critical, especially if the birth mother wants you present for the delivery.