31. The term " endomyometritis " is sometimes used to specify inflammation of the endometrium and the myometrium. 32. The cytotrophoblast cells proliferate and invade maternal endometrium , which is key to implantation and placental development. 33. "Thin endometrium " may be defined as an endometrial thickness of less than 8 mm. 34. When looking for microscopic villi, trophoblast, fetal parts, and background gestational changes in the endometrium . 35. The rest of the endometrium , in addition, expresses differences between the luminal and the basal sides. 36. The uterus has three layers; the innermost layer is the endometrium , where the egg is implanted. 37. Cancer of the endometrium , the lining of the uterus, is most common in post-menopausal women. 38. The disease process is thought to begin with some of the tissue that lines the uterus, the endometrium . 39. Two cancer types under suspicion were cleared _ the breast and the endometrium , the lining of the womb. 40. This system utilized a heated saline filled balloon which was inserted into the uterine cavity to ablate the endometrium .