According to the most recent report, more number of American women are opting to not to bear kids than three decades back.

Almost 20%of older women do not have kids, which is contrasted with 10% in the 1970s, the Pew Research Center said.

In recent decades, social stress to play conventional roles has reduced in broader terms and there is more flexibility for individuals to make their own choices in regards to having kids or none at all.

This may well play a major part in lowering strain on people to get married and bear kids, said D'Vera Cohn, a co-author of the report.

Women have additional choices than in the precedent times, so as to build strong careers and to exercise the option not to have kids, she added in an email.

The findings in the report are completely based on information from the Census Bureau's Current Population Survey.

Cohn said an additional reason for the boost is that kids are seen by some as less imperative to be there in their lives for a successful marriage. A 2007 Pew review found that 41% of adults said that kids are central for a good marriage, which is down from 65% in 1990.