Mo. Rev. Stat. § 190.609
3. An outside the hospital do-not-resuscitate order shall not be effective during such time as the patient is pregnant; provided, however, that physicians, persons under the direction or authorization of a physician, emergency medical services personnel, and health care facilities shall not be subject to civil, criminal, or administrative liability and are not guilty of unprofessional conduct if, while acting in accordance with the provisions of sections 190.600 to 190.621 and the provisions of an outside the hospital do-not-resuscitate order executed under sections 190.600 to 190.621, such persons and entities:
(L. 2007 H.B. 182)