The motherhood penalty is a term coined by sociologists, that in the workplace, working mothers encounter disadvantages in pay, perceived competence, and benefits relative to childless women. Specifically, women may suffer a per-child wage penalty, resulting in a pay gap between non-mothers and mothers that is larger than the gap between men and women. Mothers may also suffer worse job-site evaluations indicating that they are less committed to their jobs, less dependable, and less authoritative than non-mothers. Thus, mothers may experience disadvantages in terms of hiring, pay, and daily job experience.[1][2][3] The motherhood penalty is not limited to one simple cause but can rather be linked to many theories and societal perceptions. However, one prominent theory that can be consistently linked to this penalty is the work-effort theory. It is also based on the mother's intersectionality. There are many effects developed from the motherhood penalty including wage, hiring, and promotion penalties. These effects are not limited to the United States and have been documented in over a dozen other industrialized nations including Japan, South Korea, The United Kingdom, The Netherlands,[4] Poland, and Australia. The penalty has not shown any signs of declining over time.[5]