How can I find my half sister who was born on fort wayne, ind at the lutheran hospital on sept 8, 1965. She was given up for adoption to the lutheran social services right after her birth.

It depends on the hospital and what kind of adoption. Some are closed and are very hard to find out any information, others they will share with you what they know and you just have to trace form there.

I am sure that if you know much you have already searched.

If you have a first and last name or a married name it is possible that you could even find her on Google.