 That wasn't the way it was back then. And so Mary was always planning on consecrating herself to God in this way until the angel intervenes. And so the angel Gabriel explains, oh, this is how it's going to happen. The Holy Spirit will come upon you. The power of the Most High will overshadow you. Therefore, the child to be born will be called Holy, the Son of God. So we may have here some good evidence for a doctrine of the perpetual virginity of Mary as well.