Definition of "menstrual cycle" []

• The recurring cycle of physiological changes in the females of some animal species that is associated with reproductive fertility; especially the cycle in a human woman. (noun)

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• "A Chicago advertising agency has been studying the housewife’s menstrual cycle and its psychological concomitants in order to find the appeals that will be more effective in selling her certain food products."
• "--and there's Elizabeth Reifstaffel, who wants to research her master's thesis on the effects of the menstrual cycle on dream content."