#endometrium  the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition
  supertype:  mucous_membrane__mucosa  mucus-secreting membrane lining all body cavities or passages that communicate with the exterior
  substance:  decidua
  part of:  uterus__womb  a hollow muscular organ in the pelvic cavity of females; contains the developing fetus
     part of:  female_reproductive_system  the reproductive system of females
        part of:  female_body  the body of a female human being
           part of:  female_person__female  a person who belongs to the sex that can have babies

No statement uses or specializes endometrium; click here to add one.