menstrual cycle phase ovulation cycle menstrual cycle http://id.loc.gov/authorities/subjects/sh85083601 http://purl.bioontology.org/ontology/MESH/D008597 http://purl.obolibrary.org/obo/NCIT_C16838 https://en.wikipedia.org/wiki/Menstrual_cycle QP261-QP263 RG161-RG163 E1.0.2.3.0.0.1 A type of ovulation cycle where the endometrium is shed if pregnancy does not occur. The cyclic cellular, histological, and functional changes in the ovary during the menstrual cycle in response to the changing endocrine environment. endometrial menstrual cycle menstrual cycles The Complete Dictionary of Sexology