A new report from Pew Research Center has said that many more American women are electing not to have kids

"In recent decades, social pressure to play traditional roles has lessened in a broad variety of ways and there is more leeway for individual choice. This could play a part in lowering pressure for people to get married and bear children," said D'Vera Cohn, a co-author of the report.
Data from the Census Bureau's Current Population Survey was used for the study. The report said that one in five white women ages 40-44 were childless in 2008 as compared to 16% of Asian women and 17% of black and Hispanic women.
The report also found that education may play a role in childlessness with highly educated women opting not to have kids.
Source-Medindia