ISO birth mother. Male born 10/17/78 Richmond Heights Mo (St. Louis)

I am searching for my birth mother. I was born in Richmond Heights (St Louis) Mo. My birth certificate states my date of birth as 10-17-1978. I am a white male, possible Irish decent. I was adopted out through Catholic Charities in St Louis. After my birth I was placed in a foster home and then given to my adoptive family in St Louis. My adoptive name is Michael William Davidson.Any information or advise is greatly appreciated.