 These are risk factors for infection and respiratory issues that only increase in women who are pregnant.Furthermore, 78% of women are laborers and 55% of women considered their work to be of a moderate workload.These jobs increase the strain on a pregnant mother's health by losing energy that is not being adequately compensated by dietary intake, using an upright posture that may diminish uterine blood flow and affect supply of oxygen and nutrients to fetus, and adding mental stress related to maternal work outside the home that may affect intrauterine growth and gestational duration.