Who is she referring to?

Reading Luke 1: I think we can assume that when Zacharias went home, he wrote down what had happened to tell Elizabeth why he couldn't speak and what the angel had said. When Elizabeth mets Mary later, she blessed Mary and Jesus in v42, and then in v45 says "blessed is she who believed that there would be a fulfillment of what had been spoken to her by the Lord." Is she talking about Mary again, or using a circumlocution to talk about herself and what Zacharias had told her he had been told?