part of part of adjacent to adjacent to endometrium organ component layer reproductive structure uterine lumen functional layer of endometrium https://github.com/obophenotype/uberon/issues/3803 https://upload.wikimedia.org/wikipedia/commons/8/87/Cells_of_the_uterus_in_different_menstrual_cycle_stages.png outer layer of endometrium UBERON:0022356 endometrial functional layer The layer of the endometrium adjacent to the uterine lumen, comprising the luminal epithelium, the superficial portions of the uterine glands, and the surrounding vascularized stroma, and supplied by the spiral arterioles. It proliferates and differentiates across the ovarian cycle under the influence of oestrogen and progesterone, and is the site of embryo implantation and decidualization. In menstruating species it is shed at menstruation and regenerated from the basal layer in the following cycle. stratum functionale endometrii stratum functionalis of endometrium NCIT:C32642 FMA:86493 functionalis layer