ABSTRACT
The endometrium forms the mucosal lining of the myometrium between the interstitial segments of the fallopian tubes in the uterine cornua on either side of the fundus and the isthmical portion above the cervix. It is a complex tissue composed of surface epithelium, glands, stromal and inflammatory cells and blood vessels. The morphology of the endometrium is dependent on its anatomical location within the uterus. The endometrium is generally fairly uniform in appearance in the fundus and body and is conventionally divided into two components: the basal layer, adjacent to the myometrium, and the functional layer, superficial to the basal layer. Stromal edema becomes prominent and delineates the middle of the endometrium into the spongy layer. The spiral arteries give off anastomosing branches to the glands and stroma of the functional layer, and they terminate in a complex anastomotic network in the superficial layer of the endometrium.
