The use of nitrous oxide should be limited to cases where topical and local anesthetics are inadequate. In such situations, consultation with the prenatal care provider would be prudent. Adequate precautions must be taken to prevent hypoxia, hypotension and aspiration (13). Alterations in anatomy and physiology induced by pregnancy have anesthetic implications and present potential hazards for the mother and the fetus. Therefore, most anesthesiologists prefer to use local and regional anesthetics for pregnant women
