Work with reproductive hazards requires special containment practices in addition to those described in Chapter 6 for toxic chemicals and in the Biological Safety Manual. Reproductive hazards are defined by the OSHA Laboratory Standard as substances that cause chromosomal damage (mutagens) and substances with lethal or teratogenic (malformation) effects on fetuses. These can include chemicals, biological materials, and radioactive materials. The University policy for protecting pregnant employees is provided later in the section entitled “Reproductive Hazards and the Pregnant Employee”. For a list of known reproductive toxins, refer to Appendix 8-A.