specific staining was observe only during the luteal phase of the menstrual cycle it was found that cyclooxygenase was localised in the surface and glandular epithelium of the endometrium but could not be demonstrated in the endometrial stroma , myometrium or blood vessels the location of specific staining for cyclooxygenase and its variation during the menstrual cycle was the same regardless of the amount of menstrual blood loss .
C0014180
endometrium
C0227849
endometrial stroma