Even in two-parent households, 70 percent of women report that they are fully or mostly responsible for housework, and 66 percent report they are fully or mostly responsible for childcare (I couldn’t find a percentage for the mental/ emotional work of managing a family, but feel free to estimate). Additionally, a huge number of women are the sole providers for their children—according to the Pew Research Center, mothers are the sole or primary provider in 40 percent of households with children.