After decades of decline, the number of stay-at-home mothers is on a steady rise in the US, according to a new study from the Pew Research Center.

Only a small minority of those choosing not to work are affluent women, while the share of stay-at-home mothers living in poverty has doubled since the 1970s.

These days they are more likely to be single and foreign-born, and more of them are forced to stay at home because they cannot find a job.

The BBC's Franz Strasser reports.

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