John, yes, it's not an exact science but I think that we might be on to something. We are seeing that the frogs we have labeled as males are for the most part larger and exhibit a wider head then the ones we have labeled females. This is really the only thing we can go by at this point and we know that this can be wrong. We are just making preliminary guesses as to the sex to see where they end up at a couple of months from now. Hopefully we are right with our estimates as we are heavy on the male side right now based on our observations.