In small animal veterinary medicine, 35-45% of cardiopulmonary arrest (CPA) cases experience successful return of spontaneous circulation (ROSC), but only 2-10% of these survive to discharge (Fletcher 2012). Successful cardiopulmonary resuscitation (CPR) and post cardiopulmonary arrest (PCA) care, hinges on the understanding of the disease processes occurring, as well as the treatment regimes needed to correct them. An immediate and systematic approach of these regimes must be taken to gain and maintain return of spontaneous circulation (ROSC). RECOVER guidelines and algorithms have been standardized through the extensive evaluation of literature to facilitate this process. This case goes through the CPR and PCA care that was used to successfully resuscitate a pregnant patient, who arrested under general anesthesia. The cause of the arrest remains speculation, however the theory is that the patient had an anaphylactic reaction to the cefazolin administered pre­operatively.