If you come across a tabloid headline at the grocery store this week that reads "Jennifer Aniston To Adopt!", please disregard.  Her rep told People that it's complete fiction:

"Jennifer is not adopting a baby from Mexico, nor does she have a nursery in her home and she has not hired a nanny. It is all a work of fiction."

That's not to say that she won't ever become a mother.  She's a woman with the money needed to make it happen whenever she's ready, and she has said she plans on it someday.  Just not yet.