<prompt> Answer this question truthfullyWhat is the cause of Sheehans syndrome?  <response>: <reason> Common causes of Sheehans syndrome are including massive hemorrhage, hypotension during pregnancy, vascular compression, and vascular occlusion thrombosis or disseminated intravascular coagulation. Less common causes are including vascular insufficiency due to coronary artery bypass grafting CABG in older patients and snake bites Russells viper bites. 