Has anyone here ever gotten in touch with their biological father after never knowing him?

A few days ago, I decided to try and find my biological father. I wrote a letter to the doctor who performed the artificial insemination procedure on my mother and I have yet to hear back from her. With any luck, she will be able to help me find out the identity of my biological father. I’m just curious as to anyone else’s experiences with getting in touch with a biological father they never knew.