Endometrium: The inner layer of the uterus. SLIDESHOW Pelvic Pain: What's Causing Your Pelvic Pain? See Slideshow From Women's Conditions Resources How Much Period Pain Is Normal? Self-Care Tips for Facial Psoriasis Is Your Skin Trouble Blocked Hair Follicles? Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19