For this game you will need a baby doll and a CD player with a CD.
This game is played just like hot potato, but with the baby doll. Start the music. The guests pass the baby around until the music stops. When the music stops, the person holding the baby is eliminated. Play until there is only one person left. That person wins a prize (the CD that was playing, perhaps?)
If the mom-to-be is having twins, play this game with TWO baby dolls for added fun!