"Baby on Board" is the 24th episode of the third season of the American sitcom Modern Family, and the series' 72nd episode overall. It aired on May 23, 2012. The episode was written by Abraham Higginbotham and directed by Steven Levitan. The episode features guest actors Reid Ewing and Terri Hoyos. It was viewed by 10.07 million people in its original US broadcast.

Mitch (Jesse Tyler Ferguson) and Cameron (Eric Stonestreet) are getting ready to attend Lily's (Aubrey Anderson-Emmons) dance recital when they receive a phone call they waited for a long time. A mother from Calexico, California chose them to adopt her baby and she is giving birth at that moment. The two of them leave Lily with Jay (Ed O'Neill) and Manny (Rico Rodriguez) to baby-sit her and take Gloria (Sofía Vergara) with them to serve as a translator since the family does not speak English. Gloria ends up feeling sick on the car ride to the hospital. When they get to the hospital, a chain of events lead to them not getting the baby as the grandmother of the mother finds out about it and wants to raise it on her own. Mitch and Cameron have to deal with the disappointment once again.

Meanwhile, Jay and Manny have to baby-sit Lily and also take her to her dance recital. Getting there, Lily does not want to go on stage and perform because her daddies are not there. Jay talks to her trying to convince her to get on stage and she agrees she will do it only under one condition: if Jay dances with her.

At the Dunphy's house, Alex (Ariel Winter) is getting ready to attend her first prom. Phil (Ty Burrell) and Claire (Julie Bowen) are excited for her, not only because she will go to her prom, but also because she is going with her new boyfriend, Michael (Joe Metcalf). When they see Michael, all the excitement goes away because they can see that he is clearly gay, only that he doesn't know it yet.

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