She did leave her with her mother.
A sum up of the show:
Monica & Chandler ended up with 2 children. One girl and one boy. They mother they were adopting from had twins but she didn't know she was.
Joey got a new

and duck for Chandler but Chandler told him to keep them with him. They then got stuck in the foozball table. The guys couldn't bring there selves to break the table but Monica was thrilled to destroy it to get the birds out.
Ross told Racheal how much he loved her after trying to find the right time through the show. He ended up chasing her to the airport. At first she said she had to go and got on the plane but then after Ross got back home she showed up too. She had gotten off the plane.
Pheobe & her hubby decided they want to have a bunch of kids.