1. Di Saia PJ. Microinvasive cancer of the cervix in pregnancy. In: Nichols DH, DeLancey JOL. Clinical
                                                                                                                problems, injuries and complications of gynecologic and obstetric surgery. 3rd ed. Baltimore:Williams &
                                                                                                                Wilkins;1995:134.
                                                                                                                2. Awwad, JT, Toth, Tl. Schlff, I. Abnormal uterine bleeding in the perimenopause. Int J Fertil Menopausal
                                                                                                                Stud 1993 Sep-Oct;38(5):261-9. Review.
                                                                                                                3. Emanuel MH, Wamsteker K, Lammes FB. Is dilatation and curettage absolute for diagnosing intrauterine
                                                                                                                disorders in premenopausal patients with persistant abnormal uterine bleeding? Acta Obstet Gynecol Scand
                                                                                                                1997 Jan;76(1):65-8.
                                                                                                                4. MacKenzie IZ, Bibby JG. Critical assessment of dilation and curettage in 1029 women. Lancet 1978 Sep
                                                                                                                9;2(8089):566-8.
                                                                                                                5. Grimes DA. Diagnostic dilatation and curettage: a reappraisal. Am J Obstet Gynecol 1982 Jan 1;142(1):1-6.
                                                                                                                6. Rock JA, Thompson JD. Te Linde’s operatibe gynecology. 8th ed. Philadelphia:Lippincott Williams &
                                                                                                                Wilkins;2001:464-75.
                                                                                                                7. Adams Hillard PJ. Benign diseases of the female reproductive tract: symptoms and signs. In: Berek JS.
                                                                                                                Novak’s gynecology. 13th ed. Philadelphia:Lippincott Williams and Wilkins;2002:351-420.
                                                                                                                8. Karlsson B, Granberg S, Hellberg P, Wickland M. Comparative study of transvaginal sonography and
                                                                                                                hysteroscopy for the detection of pathologic endometrial lesions in women with postmenopausal bleeding. J
                                                                                                                Ultrasound Med 1994 Oct;13(10):757-62.
                                                                                                                 
                                                                                                                9. Alcazar JL, Laparte C. Comparative study of transvaginal ultrasonography and hystroscopy in
                                                                                                                postmenopausal bleeding. Gynecol Obstet Invest 1996;41(1):47-9.
                                                                                                                10. Conoscenti G, Meir YJ, Fischer-Tamaro L, Maieron A, Natale R, D’Ottavio G, et al. Endometrial
                                                                                                                assessment by transvaginal sonography and histological findings after D&C in women with
                                                                                                                postmenopausal bleeding. Ultrasound Obstet Gynecol 1995 Aug;6(2):108-15.
                                                                                                                11. Smith-Bindman R, Kerlikowske K, Feldstein VA, Subal L, Scheidler J, Segal M, et al. Endovaginal
                                                                                                                ultrasound to exclude endometrial cancer and other endometrial abnormalities. JAMA 1998 Nov
                                                                                                                4;280(17):1510-7.
                                                                                                                12. Weaver J, McHugo JM, Clarc TJ. Accuracy of transvaginal ultrasound in diagnosing endometrial pathology
                                                                                                                in women with post-menopausal bleeding on tamoxifen. Br J Radiol 2005 May;78(929):394-7.
                                                                                                                13. Kazandi M, Aksehirli S, Cirpant, Akercan F. Transvaginal sonography combined with salin contrast
                                                                                                                sonohysterography to evaluate the uterine cavity in patients with abnormal uterine bleeding and
                                                                                                                postmenopausal endometrium more than 5 mm. Eur J Gynecologic oncology 2003;24(2):185-90.
                                                                                                                14. Gull B, Karlsson B, Milsom I, Granberg S. Can ultrasound replace dilation and curettage? A longitudinal
                                                                                                                evaluation of postmenopausal bleeding and transvaginal sonographic measurement of the endometrium as
                                                                                                                predictors of endometrial cancer. Am J Obstet Gynecol 2003 Feb;188(2):401-8.
                                                                                                                15. Guven MA, Bese T, Demlrklrant F. Comparison of hydrosonography and transvaginal ultrasonography in
                                                                                                                the detection of intracavity pathologies in women with abnormaluterine bleeding. Int J Gynecol Cancer
                                                                                                                2004 Jan-Feb;14(1):57-63.
                                                                                                                16. Kelekci S, Kaya E, Alan M, Alan Y, Bilge U, Mollamahmutoglu L. Comparison of transvaginal
                                                                                                                sonography, saline infusion sonography, and office hysteroscopy in reproductive-aged women with or
                                                                                                                without abnormal uterine bleeding. Fertil Steril 2005 Sep;84(3):682-6.
                                                                                                                17. Alborzi S, Parsanezhad ME, Mahmoodian N, Alborz S, Alborzi M. Sonohysterography versus transvaginal
                                                                                                                sonography for screening of patients with abnormal uterine bleeding. Int J Gynecol Obstet 2007
                                                                                                                Jan;96(1):20-3.
                                                                                                                18. Jacobs I, Gentry-Maharaj A, Burenell M, Manchanda R, Singh N, Sharma A, et al. Sensitivity of
                                                                                                                transvaginal ultrasound screening for endometrial cancer in postmenopausal women: a case-control study
                                                                                                                with the UKCTOCS cohert. Lancet Oncol 2011 Jan;12(1):38-48.
                                                                                                                19. Zare Z, Shadman Zijerdi M. Can ultrasound predict the presence of retained productsof conception
                                                                                                                following first-trimester spontaneous aboration? Int J Iran Red Crescent Soci 2010;12(2):187-9.
                                                                                                                20. Ustunyurt E, Kaymak O, Iskender C, Ustunyurt OB, Celik C, Danisman N. Role of transvaginal sonography in
                                                                                                                the diagnosis of retained products of conception. Arch Gynecol Obstet 2008 Feb;277(2):151-4.
                                                                                                                21. Balic D, Balic A. Office hysteroscopy transvaginal ultrasound and endometrial histology; a comparison in
                                                                                                                infertile patients. Acta Med Aacad 2011;40(1);34-8.
                                                                                                                22. Kamel HS, Darwish AM, Mohamed SA. Comparison of transvaginal ultrasonography and vaginal
                                                                                                                sonohysterography in the detection of endometrial polyp. Acta Obstet Gynecol Scand 2000 Jan;79(1):60-4.
                                                                                                                23. Lasek W, Migda M, Pileki S, Serafin Z, Jeka S, Rosinska-Migda J. [Transvaginal ultrasonography and
                                                                                                                sonohysterography in the diagnosis of benign uterine lesions in women at peri- and postmenopausal age]
                                                                                                                [Article in Polish]. Pol Merkur Lekarski 2004 Jul;17(97):47-9.
                                                                                                                24. Nanda S, Chadha N, Sen J, Sangwan K. Transvaginal sonography and saline infusion sonohysterography in
                                                                                                                the evaluation of abnormal uterine bleeding. Aust N Z J Obstet Gynecol 2002 Nov;42(5):530-4.
                                                                                                                25. Niknejad M, Ahmadi F, Zafarani F, Khalili G, Ghaderi F, Rashidi Z. Diagnostic accuracy of transvaginal
                                                                                                                sonography in infertile patient with endometrial polyps. IJFS: Ins J Fertil Steril 2010 Feb-Mar;3(4):157-60.
                                                                                                                26. Cepni J, Ocal P, Erkan S, Saricali FS, Akbas H, Demirkiran F, Idil M, Bese T. Comparison of transvaginal
                                                                                                                sonography, saline infusion sonography and hysteroscopy in evaluation of uterine cavity pathologies. Aust
                                                                                                                N Z J Obstet Gynecol 2005 Feb;45(1):30-5.