In the United States, one-third of mothers return to work within three months of giving birth, compared to only 5 percent in other industrialized countries such as Germany, Sweden, and the United Kingdom (Berger, Hill, and Waldfogel 29). The rapid return of mothers to the workforce has sparked interest in the effects the return has on child behavior and health. The experiments measure the baby's health and development based on the amount of time the mother breastfeeds, the vaccinations the baby receives, the score on a vocabulary test, behavioral problems, and the number of doctor visits (Berger, Hill and Waldfogel 36). Mothers who returned to work within twelve weeks were less likely to breastfeed their children, have as many doctor visits and vaccinations, and had more prominent behavioral problems at age four (Berger, Hill, and Waldfogel 39-42). The figures are significantly lower for mothers working full time within twelve weeks of maternity leave (Berger, Hill and Waldfogel 43). Therefore, it is proven that the duration of maternity leave is directly related to the development of the child and