1. 1.Antoni J, Folch E, Costa J, Foradada CM, Cayuela E, Combalia N, et al. Comparison of cytospat and pipelle endometrial biopsy instruments. European Journal of Obstetrics & Gynecology and Reproductive Biology. 1997;72(1):57-61.2.Esmaeilivand M, Mohammadi M, Khatony A, Najafi F. Comparison of DialysisAdequacy in Permanent Catheter, Fistula, and Graft Vascular Access Types. Journal of Babol University Of Medical Sciences. 2016;18(3):14-8.3.Rauf R, Shaheen A, Sadia S, Waqar F, Zafar S, Sultana S, et al. Outpatient endometrial biopsy with Pipelle vs diagnostic dilatation and curettage. J Ayub Med Coll Abbottabad. 2014;26(2):145-8.4.Rezk M, Sayyed T, Dawood R. The Effectiveness and Acceptability of Pipelle Endometrial Sampling versus Classical Dilatation and Curettage: A Three-Year Observational Study. Gynecol Obstet Invest. 2016.5.Z. Ghanbari, B.Hajibaratali, M.Fazaeli, P. Mehdizadeh, M. Dadyar. A comparison of endometrial biopsy, transvaginal ultrasonography and dilation and curettage in diagnosis of abnormal uterine bleeding. Tehran University Medical Journal. 2006;64(3):102-8.6.Kazandi M, Okmen F,Ergenoglu A, Yeniel A, Zeybek B, Zekioglu O, et al. Comparison of the success of histopathological diagnosis with dilatation-curettage and Pipelle endometrial sampling. Journal of Obstetrics and Gynaecology. 2012;32(8):790-4.7.Gungorduk K, Asicioglu O, Ertas I, Ozdemir I, Ulker M, Yildirim G, et al. Comparison of the histopathological diagnoses of preoperative dilatation and curettage and Pipelle biopsy. European journal of gynaecological oncology. 2013;35(5):539-43.8.Liu H, Wang F-L, Zhao Y-M, Yao Y-Q, Li Y-L. Comparison of Pipelle sampler with conventional dilatation and curettage (D&C) for Chinese endometrial biopsy. Journal of Obstetrics and Gynaecology. 2015;35(5):508-11.9.Ben-Baruch G, Seidman D, Schiff E, Moran O, Menczer J. Outpatient endometrial sampling with the Pipelle curette. Gynecologic and obstetric investigation. 1994;37(4):260-2.10.Gordon S, Westgate J. The incidence and management of failed Pipelle sampling in a general outpatient clinic. Australian and New Zealand journal of obstetrics and gynaecology. 1999;39(1):115-8.11.Rezk M, Sayyed T, Dawood R. Gynecologic and obstetric investigation. 2016.12.Rachamallu L, Bhavani V, Byna P. Histological correlation of pipelle endometrial sampling with dilatation and curettage in abnormal uterine bleeding. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2015;4(5):1324-9.13.Bourdel N, Chauvet P, Tognazza E, Pereira B, Botchorishvili R, Canis M. Sampling in Atypical Endometrial Hyperplasia: Which Method Results in the Lowest Underestimation of Endometrial Cancer? A Systematic Review and Meta-analysis. Journal of minimally invasive gynecology. 2016;23(5):692-701.14.Shavit YB, Rabinovici J, Carp HJ. Abnormal Uterine Bleeding. Progestogens in Obstetrics and Gynecology: Springer; 2015. p. 93-110.15.Novak E, Berek JS. Berek & Novak's gynecology: Lippincott Williams & Wilkins; 2007.16.Hillard P. Benign disease of the female reproductive tract In: Berek J (Editor), Novak’s Gynecology. Lippincott, Williams and Wilkins; 2002.17.O'connell LP, Fries MH, Zeringue E, Brehm W. Triage of abnormal postmenopausal bleeding: a comparison of endometrial biopsy and transvaginal sonohysterography versus fractional curettage with hysteroscopy. American journal of obstetrics and gynecology. 1998;178(5):956-61.18.Saygili H. Histopathologic correlation of dilatation and currettage and hysterectomy specimens in patients with postmenopausal bleeding. European journal of gynaecological oncology. 2005;27(2):182-4.19.Alliratnam A,Shankar R. Diagnostic value of pipelle endometrial sampling in comparison with dilatation and curettage among patients with abnormal uterine bleeding. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2016;5(3):864-7.