The prophecy about "the one who will bring balance to the force" is mentioned several times. From the discussion, the implication is that virgin birth is part of it, along with a few other factors that would make Anakin seem like the person it described.
But is the actual prophecy ever stated anywhere? Just how much do we know about what it said? Having just re-watched The Phantom Menace, the only clues we get are that it seems to include virgin birth and the high midichlorian count.
It's also interesting that this is the only prophecy, at least in the movies and TV show, that is ever mentioned.