Presented in seven sections, these guidelines developed largely by physicians are designed to protect the pregnant worker's health. As defined in section I, the guidelines seek to aid the pregnant worker's physician to develop recommendations for job placement, work continuation during pregnancy, and return to work following delivery. In section II health and job-related problems, pregnancy-related disability, and other issues are addressed. It is noted that despite legislation, such as the Occupational Safety and Health Act, problems remain. Peri-conceptional hazards are considered in section III; section IV discusses the physician's assessment of the patient's work and occupational environment. A sample form to aid assessment is included. Section V explores alternative physician recommendations for the worker's job fulfillment. A chart of toxins and effects is presented. Section VI examines physiological changes by trimester, followed by a systems review of normal pregnancy, complications, and environmental factors. The appendixes contain references, suggested readings, and contact addresses for the National Institute for Occupational Safety and Health, the Occupational Safety and Health Administration, state designated agencies, medical schools, and professional associations. Data and examples of women's occupational exposures, a glossary of occupational medicine terms, and an index for the guidelines are also appended. (CSS)