I'd be very wary of hypnotherapy as a means of attempting to recover a "lost" memory. A lot of the false memory stuff came out of hypnotherapy, because you are in a suggestible state that even an innocent suggestion by the therapist might trigger a false memory. Or like other people have said, if something that did happen to you when you were really small you might not even have the words to describe it. My own experience with memory is that it's a weird place. I have some very strange memories that suggest something bad happened to me, but no context for them and no means of verifying them - so I choose to ignore them. Then on the other hand I have absolutely no memory of my mother's funeral. I know objectively that I was there, but have complete memory loss from the day I was told she died until about 7 days later. Just shows you the power of dissociation.

--splitimage