“…Some workplace exposures, such as toxic chemicals, radiation (>5 rad), heavy repeated lifting, prolonged (>8 hours) standing, excessive (>80/wk) work hours, and high fatigue score may be associated with pregnancy complications, but there is insufficient evidence on the effect of avoidance of these risks (see also chap. 16). There is insufficient safety data for paint, solvents, hair dyes, fumes, anesthetic drugs, etc., with no absolute evidence of harm.…”