Credit: Danny Feld/ABC Television Group © 2010 Disney Photo: Grey's Anatomy Preview Pics: Season 7, Episode 12

Poor MerDer. They only have one big goal right now: Have a kid. But life keeps throwing obstacles in their way. It's really heartbreaking. We'd love to see a MerDer baby — not only would he or she be totally adorable, but the child would clearly grow up to be super smart and talented. But is it time for the Grey's Anatomy golden couple to consider adopting instead?