“The diagram below shows the average hours of unpaid work per week done by people in different categories.

At first glance at the chart, it is noticeable that from all the three categories (without children, with 1-2 children, and with 3 or more children), married women spend more hours involved in unpaid work such as housework, gardening, and childcare than expected from men.
Married women with children spend more time on unpaid works than without children as the chart shows. Meanwhile, having more than three children results in investing around 60 hours of unpaid work for them. This is probably due to the extra housework and childcare needed to run such a big family.
Furthermore, though there are visible variations of the number of hours of unpaid work carried out by married women, there is no significant variation among all three categories for married men in terms of work hours that are not paid (30 or fewer hours). It is observed that married men with three or more children spent slightly less number unpaid work hours. This might be due to the high requirement of commitment needed for a paid job to meet financial requirements for a big family.