Based on a short story by Jeffrey Eugenides (Middlesex), The Switch is a comedy about artificial insemination. The premise has potential, but this Jennifer Aniston vehicle quickly loses its nerve. The always enjoyable Jason Bateman tries to add some caustic wit, but his effort is in vain.

AP - Capsule reviews of films opening this week:

Reuters - In your traditional Hollywood romantic comedy, the woman usually has a simple goal -- find Mr. Right, get married, and start a family. Ahhh, but how times have changed.

AP - Not a single moment rings true in "The Switch," which is unfortunate because it's actually about a situation in which a lot of women find themselves.

Reuters - Despite a virtually unplayable premise, "The Switch" overcomes this handicap to turn itself into a friendly, offbeat romantic comedy.

Reuters - Ryan Reynolds and Jason Bateman are teaming for "Change Up," the latest entry in Hollywood's long line of body-switching comedies.

AP - Jim Carrey, Colin Firth and Bob Hoskins have appeared in central London to switch on the city's Christmas lights and attend the world premiere of a 3-D film, "A Christmas Carol."