The hard work doesn’t build character, says the organization, which is dedicated to providing humanitarian and developmental assistance.

“The types of chores commonly undertaken by girls — preparing food, cleaning and caring for others — not only set the stage for unequal burdens later in life but can also limit girls’ outlook and potential while they are still young,” according to the study.

The chores socialize girls into thinking that domestic duties are the only ones they’re qualified for. Chores such as cooking, cleaning and fetching water are not as highly valued as other tasks that may earn money for a family. That has “lasting effects on [girls’] self-esteem and sense of self-worth,” the study says.