Take the case of 29-year-old Jennifer Stepp, who lives in Reading, Pa. Like 14 million other people in the U.S. who live in families headed by single mothers, she's poor. And she faces incredible odds.
Stepp has three children by three different fathers. The father of her eldest child, 10-year-old Isaiah, is serving 30 years in federal prison for armed robbery.
"He's met my son one time, when he was a baby. And he decided that he didn't want him," she says.
Stepp's middle child, 8-year-old Shyanne, usually sees her father every other weekend. But the father of her younger son is also in prison. Stepp says he's been behind bars for selling cocaine since she was pregnant. He has never met 1-year-old Makai.
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Her employer, Opportunity House, pays half the rent. It's one of many things her employer does to help her out.
Stepp says her parents also struggled, and they didn't really show her how to apply for a job or to college. She had to figure it out herself. Still, her safety net is pretty broad. Her mother stops by many nights to help put the kids to bed. Stepp also gets food stamps and medical aid for the kids.