Hall, H H Effect of intrauterine stainless steel ring on endometrial structure and function. [electronic resource] - American journal of obstetrics and gynecology Dec 1965 - 1031-41 p. digital Publication Type: Journal Article ISSN: 0002-9378 Standard No.: 10.1016/0002-9378(65)90168-7 doi Subjects--Topical Terms: BiopsyContraceptive Devices--adverse effectsEndometrium--pathologyFemaleHistocytochemistryHumansIn Vitro Techniques