This is a good case study to describe Jennifer Aniston and the rest of 40s women in the industry. Well, according to a new research study, 1 out of 5 American women in their 40s is "childless". Compared to one in ten women data comparison just 10 years ago. But the report released by Pew Research Center, cited Americans with "doctorate degree" or those women called "most educated", as the group with most number of cases of "no child."Quick fact: Jennifer Aniston, 41, is still childless. Aniston and husband Brad Pitt separated in 2005 with no child.

"The most educated women are still the most likely to be childless," says report co-author D'Vera Cohn. "It's just that the rates have come down."Cohn added: "The fact that nearly one of five women does not have a child of her own -- that's an enormous transformation from the past." Extra: A new magazine report claims Jennifer Aniston is planning to adopt a baby. Check out the scoop.