My mother asked the name of a movie that I've never seen previews for anyway I guess it is a new released or maybe just getting ready to be in theaters. All she has to go on is that it's about a mother who is giving the wrong child on purpose and she's not fooled and is trying to find her real son. Can anyone help.

Sounds like Changeling (2008) (http://www.imdb.com/title/tt0824747/)