Is baby posterior ATM? If he is in a great position for birth, then there is no reason at all why it should be just as, if not more difficult than your first birth. And you also don't *know* his size - there is no guarantee that he will be that big, its just *possible* that he could be. It is common to measure ahead of dates for a lot of different reasons, so don't let the fear of a big baby hold you back. Even a small baby can be difficult to birth. I don't know of anyone who has birthed a 10lb baby via VBAC though. At the end of the day, you need to choose the best way for you to give birth, and if you have any fears at all you need to let go of them to have a great birth either way. Which ever one you choose will be right for you.