Annie and Joby Johnston tried, unsuccessfully, to have a baby for five long years. Annie says in that time she never even had one positive pregnancy test, and they had just about given up hope when Annie's sister, Chrissy, volunteered to be a surrogate. Doctors implanted her with embryos, and implanted some in Annie too just for good measure.
Back in my hometown there's a popular saying that goes "When the man upstairs gives, he gives with both hands." That couldn't be more true for the Johnstons, because it turns out that not only did Chrissy get pregnant, so did Annie - and they were both expecting twins. Just like that, five years of having zero babies was turned around into have four at once!