For those in the rush hour of life, things aren’t slowing down. According to a new Pew Research Center study, more than half of working parents find it hard to balance work and family, and women are struggling more than men: One in five working moms say it’s not just difficult, but very difficult, versus 12 percent of working dads. And mothers are twice as likely as fathers to say parenthood has hurt their career.

But one group in the study appeared to emerge at least moderately content: moms who work part time. They’re more likely to take the juggling act in stride (only 11 percent of them say it’s “very difficult” to balance work life and home life) and they’re also more likely to be satisfied with the amount of time they spend with their children.

Percentage of Moms Who Think They Spend the “Right” Amount of Time With Their Kids

Quartz | Pew Research Center

That full-time working moms feel stretched for time they’d prefer to devote to their kids is not surprising. As for the non-employed moms, one might think even more of them would be satisfied with their family, considering many of them gave up work or didn’t take it up in order to be at home, but apparently some are still not getting as much time with the kids as they’d hoped—while perhaps others are getting more than they’d expected. In any case, the part-timers seem to be closest to the sweet spot.