More U.S. women than ever are breadwinners, Pew study finds Mothers are breadwinners for a record share of American families, as more women bring up children on their own and more married mothers outearn their husbands, an analysis of census data shows. The new reality is a dramatic shift from decades ago, the Pew Research Center found in a study released Wednesday. Two years ago, more than 40% of American households with children relied on a mother as their biggest or only source of income - a massive jump from 11% of families in 1960. Two things drove the change: Single mothers now make up a quarter of all U.S. households with children, the Pew analysis of U.S. Census Bureau data found. On top of that, a growing share of married mothers make more money than their husbands, as more women earn degrees and enter the workforce. Wives earn more in nearly 1 out of 4 married couples, Pew found. "I always thought I'd be working - not just for the financial implications, but because I love what I do," said Karen Potter, a Dana Point mother who works as an endodontist and is married to a lawyer. When her baby daughter grows up, "I hope and pray that she knows you can be there for your children and have a career that you're passionate about." Yet even as more American families rely on working mothers, Pew found many people remain uneasy about moms at work. Nearly 3 out of 4 adults surveyed said the growing number of working mothers made it harder for families to raise children. About half said children were better off with their mothers at home, while only 8% said the same about fathers. Those worries persist even though Americans are mindful of the economic benefits for families when moms head to work - and despite the fact that the vast majority of Americans don't think women should return to "traditional roles," Pew discovered. "Maybe in the future this will just be the norm and it won't be unusual to anybody," said Kim Parker, associate director of the Pew Social and Demographic Trends project. But now, the public is still working through a lot of this stuff. Families who don't fit the "Leave It to Beaver" mold see those misgivings firsthand. Fathers still outearn mothers in most married families, despite the rise in female breadwinners. Stay-at-home dads, still a small fraction of fathers, are met with surprise and sometimes even suspicion. When an Ohio preschool called for parent volunteers, "it was called the 'Mommy Helper Day,'" said Jenna Huff, an Akron physician whose husband is a stay-at-home dad. My husband was obviously not the mommy - but he was the helper. Eleanor Sayre, a Kansas State University physics professor, said elementary school staffers almost always called her to check when her daughter was absent, even though her husband is listed as the emergency contact. The sexism is far worse for him as a stay-at-home dad to their two children, she said. He'd be at the playground with our daughter when she was 2 or 3 and people would be giving him the stink-eye, because what's a man doing at the playground? Sayre said. The American workplace has also lagged behind the changes reshaping families, said Stephanie Coontz, director of research and public education for the Council on Contemporary Families. The U.S. doesn't guarantee new parents the time off that other wealthy countries do, she said. Families in which both parents work are common, but workplace norms have been "predicated on the idea that you could ask a worker to give their all, because somebody else would be at home," Coontz said. This is a crazy assumption to continue to operate on. Though married couples try to juggle the demands of work and home, concerns remain about single mothers trying to do the same. Nearly 2 out of 3 Americans see the rise in single motherhood as a "big problem," Pew found in surveys this spring. However, worries about working moms, single or married, have softened with time, and younger adults are much less troubled by the trends, Pew found. More than half of young adults said the increase in unwed motherhood was a small problem or not a problem at all. Researchers also found that most people now reject the idea that a wife outearning her husband is bad for a marriage. Back when Huff was dating her husband - who was working as a waiter - a customer razzed him about the fact that she was going to make more money as a doctor. His reaction? Who cares?" she recounted.