Participation in the labor force has surged among women in their prime working years. But for those with children under 5, the gains may have peaked. Women and Girls, Labor and Jobs, Child Care, Parenting, Telecommuting, Hiring and Promotion, Part-Time Employment, United States Economy, United States Participation in the labor force has surged among women in their prime working years. But for those with children under 5, the gains may have peaked. NYT > Business