The answer to this question depends on which baby you're referring to! There have been many babies born in Grey's Anatomy, and several female characters have given birth. To give you a more specific answer, could you please clarify which baby you're asking about?
For example, you could specify:
- The name of the mother: "Which girl had Meredith Grey's baby?"
- The name of the father: "Which girl had Derek Shepherd's baby?"
- The season or episode: "Which girl had the baby in Season 10, Episode 15?"
Once you provide more information, I can give you a definitive answer!