Anorexia nervosa is a serious psychiatric disorder characterized by an intense desire for thinness which consequently leads to a notable reduction in food intake and body mass. This psychiatric disorder is exceptional because it requires endocrine dysfunction, menstrual abnormalities. The disorder is also classified by the suppressed or delayed onset of menstrual cycles. Previous literatures, using rodent and human populations, have found that ovarian hormones are correlated with normal and abnormal patterns of feeding behavior. The current study adds to previous knowledge by examining the normality of the menstrual cycle and its interaction with stress and how it influences eating patterns in individuals with psychiatric disorder. Researchers hypothesized that stress levels would increase during periods of meal skipping, binge eating, and self-induced vomiting and decrease after such events (Jappe, et. al, 2013). The present study conducted its experiment using 121 female participants. These women were all recruited from treatment facilities and provider mail services ...