Nearly half of women continue working during at least part of pregnancy. Health promotion for the pregnant client includes a focus on the impact of work on her health and the health of her fetus. Concerns about environmental hazards in the workplace, workplace stressors, and a non-supportive work environment contribute to the psychological vulnerability of the pregnant worker. However, working can also provide the pregnant woman with important health resources. Because of the potential of work during pregnancy to be both a stressor and a benefit, individualized assessment and counseling for each pregnant woman is indicated.