In Serch of Birth Mother

I am helping My Husband Serch for his birth Mother, There are No strings attached, We are just Looking for medical information. We have a 12 year old son and Need to know more for his sake. We do not know much about My husbands birth and not really for sure where he was born. His birth certificate says Shellbyville but then has Gordon County wich I am not even sure that there is one in TN. And Shellbyville is NOT Gordon County! My Husband was born June 25, 1970 and was not adopted until September 22, 1970. we do not know where he stayed till then. My Husband is a Big man Tall as well as built Big, so I am almost sure he was born a big baby. If any one know Anything or if this might sound like something you know about PLEASE Reply Thank you for your time, Debbie & Anthony