Khoo, S K Contraception with a six-monthly injection of progestogen. 3. Effects on the endometrium. [electronic resource] - The Australian & New Zealand journal of obstetrics & gynaecology Nov 1971 - 226-32 p. digital Publication Type: Journal Article ISSN: 0004-8666 Standard No.: 10.1111/j.1479-828x.1971.tb00483.x doi Subjects--Topical Terms: BiopsyContraceptive Agents--administration & dosageDelayed-Action PreparationsEndometrium--anatomy & histologyFemaleHumansInjectionsMedroxyprogesterone--administration & dosage