About Us

Prof. Dr. Engin Oral was born in Istanbul in 1965 and has built a prominent career in medicine. After graduating from Kabataş Erkek Lisesi in 1982, he completed his studies at Istanbul University’s Çapa Medical Faculty, ranking third in his class. He then continued his residency in Obstetrics and Gynecology at Cerrahpaşa Medical Faculty, finishing in 1993.
In 1995, he began his training in reproductive endocrinology and in vitro fertilization at Yale University. He earned his associate professorship in 1997 and became a full professor in 2003.
Prof. Dr. Oral specializes in reproductive medicine, infertility, endometriosis, and adenomyosis, and he has published numerous studies and articles on these subjects. He is the founder of the Turkish Endometriosis and Adenomyosis Society and actively participates in and organizes international scientific meetings.
He currently works at the Department of Obstetrics and Gynecology at Biruni University Hospital. His areas of expertise include reproductive endocrinology, infertility treatment, and endoscopic surgery. He serves on the boards of several international associations.
Prof. Dr. Oral emphasizes the challenges of managing pain and stress associated with illnesses, stating, “Dealing with pain and stress in diseases is much harder than treating the illness with medication!” He has authored 77 publications that have received international citations and has been a speaker at many international conferences.
- Reproductive Endocrinology (Polycystic Ovary Syndrome, Contraception, Menopause)
- Infertility-IVF
- Endometriosis
- Endoscopic Surgery (Laparoscopy and Hysteroscopy)
Postdoctoral Fellow Obstetrics and Gynecology Department, Division of Reproductive Endocrinology and Infertility (Mentors David L Olive and Aydın Arıcı) Yale University Medical Faculty USA, 1995-1996
Biruni University, Faculty of Medicine, Clinical Professor,
Head of Department of Obstetrics and Gynecology, 2024 – present
Bezmialem Vakıf University, Faculty of Medicine, Clinical Professor
Department of Obstetrics and Gynecology, 2020-2023
Istanbul University Cerrahpasa Medical Faculty, 1993-2019, Professor Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, 2003-2019
Associate Professor Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, 1997-2003
Chief Resident Department of Obstetrics and Gynecology, 1993 -1997
- Resident Obstetrics and Gynecology Department of Istanbul University Cerrahpasa Medical Faculty, 1988 -1992
- MD Istanbul University, Istanbul Medical Faculty (graduated from the university in third place) 1982-1988
- High School Kabatas Erkek, Istanbul, 1979-1982
ASRM EndoSIG: Vice Chair, October 2024-… (5 year)
World Endometriosis Society (WES)
May 2023-…, Executive Board Member and Secretary
Ambassador of World Endometriosis Society (2019)
European Endometriosis League (EEL)
Nov 2016 –June 2022, Executive Board Member
Nov 2018 – Nov 2020, President
Endometriosis and Adenomyosis Society, Turkey
Founder President (2009) and Executive Board Member (2009-…..)
European Society of Human Reproduction and Embryology
ESHRE / EBCOG
Centre accreditation of subspecialist training programme in Reproductive Medicine
World Endometriosis Society (WES)
European Endometriosis League (EEL)
Asian Society of Endometriosis and Adenomyosis (ASEA)
European Society of Human Reproduction and Embryology (ESHRE)
American Society for Reproductive Medicine (ASRM)
American Association of Gynaecologic Laparoscopists (AAGL)
European Society for Gynaecological Endoscopy (ESGE)
American College of Obstetricians and Gynecologists (ACOG) (Associate Membership International)
European Menopause and Andropause Society (EMAS)
International Menopause Society (IMS)
Endometriosis and Adenomyosis: Bench to Bedside, February 2-3, 2024, Istanbul-Turkey (Chair)
ESGE Regional Workshop, Step by Step Management of Women with Endometriosis from Diagnosis to Therapy: A Practical Approach, March 10-11, 2023, Istanbul-Turkey (Chair)
3rd International Endometriosis School, May 27-28, 2022, Istanbul-Turkey (Course Director)
ESHRE Campus Symposium organized by the SIG Reproductive Surgery and Endometriosis and Endometrial Disorders 2021: ‘Adenomyosis: What we know, and what we don’t know, March 12-13, 2021, Online (Scientific Organiser)
2nd International Endometriosis School, Dec 16-17, 2019, Istanbul-Turkey (Chair)
5th European Endometriosis Congress, Dec 5-7, 2019, Prague-Czech Republic (European Endometriosis League President)
8th Asian Conference on Endometriosis in conjunction with 13th Reproductive Apage Workshop, Aug 28-30, 2019, Pattaya-Thailand (Chair of European Endometriosis League Session)
1st International Endometriosis School, Dec 10-11, 2018, Istanbul-Turkey (Chair)
4th European Congress on Endometriosis, Nov 22-24, 2018, Vienna-Austria (Secretary Somatic Endometriosis)
13th World Congress on Endometriosis, May 17-20, 2017, Vancouver-Canada (8th Precongress Course – Endometriosis: a lifecycle approach, Chair)
3rd European Endometriosis League, Nov 17-19, 2016, Budapest-Hungary (Chairperson of National Meeting)
ESHRE Campus Symposium organized by the SIG Endometriosis & Endometrium 2016: ‘Controversies in Endometriosis and Adenomyosis’, Feb 26-28, 2016, Istanbul-Turkey (Symposium President)
Deep Endometriosis International, ”Multidisciplinary Approach” Symposium, Jan 18-19, 2014, Istanbul-Turkey (Symposium President)
2nd European Endometriosis League, Nov 28-30, 2013, Berlin-Germany (Chairperson of National Meeting)
2nd Asian Conference on Endometriosis (ACE), Nov 9-11, 2012, Istanbul-Turkey (Conference President)
- Özcan, P., Varlı, B., Sarıdoğan, E., Oral, E., Mabrouk, M., Usta, T., & Constanti, A. S. (2025). Mechanisms of endometrioma-mediated ovarian damage: Myths and facts. J. Clin. Med. 2025, 14(7), 2147; https://doi.org/10.3390/jcm14072147.
- Sommara, A., Bahat, P. Y., Özaydin, I. Y., Bixo, M., Bäckström, T., Oral, E., & Turkmen, S. (Year). Influence of endometrial nerve fibers and hormones on pain in women with endometriosis. European Journal of Obstetrics & Gynecology and Reproductive Biology, 2025, https://doi.org/10.1016/j.ejogrb.2025.113950.
- N Akgun, N Sofiyeva, PB Yalcın, AS Laganà, E Oral. Role of macronutrients, dairy products, fruits and vegetables in occurrence and progression of endometriosis: A summary of current evidence in a systematic review. Facts, views & vision in ObGyn 16 (4), 409-428.
- Shamsi Mehdiyev, Fatma Basak Tanoglu, Esma Demir Altuncu, Engin Oral, Spontaneous hemoperitoneum in a 29-week pregnancy with a history of endometriosis: A case report and review of the literature. Int J Gynaecol Obstet. 2024 Nov 11. doi: 10.1002/ijgo.16006. Online ahead of print.
- Khaleque N Khan, Endometriosis Awareness Promotion Project EAPP Collaboration Group. Patterns of menstrual cycle, menstrual pain and medication usage in young women from high- and middle-income countries. Reproductive BioMedicine Online 49 (2), 103942
- Nura F Topbas Selcuki, Pinar Yalcin Bahat, Necip Deniz, Cihan Kaya, Kubra Bagci, Engin Oral. Relationship Between Recurrent Pregnancy Loss with unknown etiology and endoplasmic reticulum stress. Cureus. 2024 May 23;16(5):e60899. doi: 10.7759/cureus.60899. eCollection 2024 May.
- Kina BG, Topbas Selcuki NF, Bahat PY, Usta T, Aydin S, Rahmioglu N, Tuncer FN, Oral E. Whole exome sequencing reveals novel candidate variants for endometriosis utilizing multiple affected members in a single family. Mol Genet Genomic Med. 2024 Jan;12(1):e2312. doi: 10.1002/mgg3.2312. Epub 2023 Nov 27. PMID: 38013616; PMCID: PMC10767589.
- Etrusco A, Barra F, Chiantera V, Ferrero S, Bogliolo S, Evangelisti G, Oral E, Pastore M, Izzotti A, Venezia R, Ceccaroni M, Laganà AS. Current Medical Therapy for Adenomyosis: From Bench to Bedside. Drugs. 2023 Nov;83(17):1595-1611. doi: 10.1007/s40265-023-01957-7. Epub 2023 Oct 14. PMID: 37837497; PMCID: PMC10693526.
- Darici E, Kemahlı MNC, Bahat PY, Yücel B, Oral E. Validation of the Turkish version of Endometriosis Health Profile questionnaire (EHP-30) to evaluate the quality of life in women with endometriosis. Facts Views Vis Obgyn. 2023 Jun;15(2):131-136. doi:10.52054/FVVO. 15.2.079.PMID: 37436049
- Kaya C, Usta T, Oral E. Telemedicine and Artificial Intelligence in the Management of Endometriosis: Future Forecast Considering Current Progress. Geburtshilfe Frauenheilkd. 2022 Nov 29;83(1):116-117. doi: 10.1055/a-1950-6634
- Kale A, Aboalhasan Y, Gündoğdu EC, Usta T, Oral E. Obturator nerve endometriosis: A systematic review of the literature. Facts Views Vis Obgyn. 2022 Sep;14(3):219-223. doi: 10.52054/FVVO.14.3.032.PMID: 36206796
- Darici E, Salama M, Bokor A, Oral E, Dauser B, Hudelist G. Different segmental resection techniques and postoperative complications in patients with colorectal endometriosis: A systematic review. Acta Obstet Gynecol Scand. 2022 Jul;101(7):705-718. doi: 10.1111/aogs.14379. Epub 2022 Jun 6.PMID: 35661342 Review.
- Kale, A., Kuru, B., Baydili, K.N., Cokay, D., Basol, G., Cansu Gundogdu, E., Mat, E., Ertugrul, I., Altuntas, Y.E., Usta, T. and Aboalhasan, Y., Oral E. Combination of laparoscopic side-to-end colorectal anastomosis and vaginal nose (natural orifice specimen extraction) surgery for colorectal endometriosis: Technique and outcomes. Journal of Endometriosis and Pelvic Pain Disorders. 2022;14(3):149-157. doi:10.1177/22840265221095772
- Kale A, Baydili KNS, Keles E, Gundogdu E, Usta T, Oral E. Comparison of Isolated Sciatic Nerve and Sacral Nerve Root Endometriosis: A Review of the Literature. J Minim Invasive Gynecol. 2022 Aug;29(8):943-951. doi: 10.1016/j.jmig.2022.05.017. Epub 2022 May 29.PMID: 35649478 Review.
- Yalçın Bahat P, Ayhan I, Üreyen Özdemir E, İnceboz Ü, Oral E. Dietary supplements for treatment of endometriosis: A review. Acta Biomed. 2022 Mar 14;93(1): e2022159. doi: 10.23750/abm.v93i1.11237
- Usta T, Yilmaz S, Topbas Selcuki NF, Ayhan I, Kale A, Oral E. Surgical lysis of nerve entrapment caused by retroperitoneal fibrosis/adhesions; two case reports and a literature review Journal of Endometriosis and Pelvic Pain Disorders. 2021;13(4):284 287.doi:10.1177/22840265211058431
- Mis C., Kofali G., Swift B., Yalcin Bahat P., Senocak G., Taneri B., Hummelshoj L., Missmer A.S., Becker C., Zondervan K., Yuksel Ozgor B., Oral E., Inceboz U., Hocaoglu M. and Rahmioglu N. Protocol for the Cultural Translation and Adaptation of the World Endometriosis Research Foundation Endometriosis Phenome and Biobanking Harmonization Project Endometriosis Participant Questionnaire (EPHect). Front. Glob. Womens Health, 26 March 2021 https://doi.org/10.3389/fgwh.2021.644609
- N.F.T.Topbas Selcuki, S.Yilmaz, C.Kaya, T.A.Usta, E.Oral. Thoracic Endometriosis: A Review Comparing 480 Patients Based on Catamenial and Non-Catamenial Presentation. November 2020Journal of Minimally Invasive Gynecology 27(7): S45 DOI: 10.1016/j.jmig.2020.08.374
- Topçu HO, Kaya C, Oral E. Fertility issue in early stage endometrial cancer patients. Translational Cancer Research. 2020;9(12):7797-808.
- Yalçın Bahat P, Kaya C, Selçuki NFT, Polat İ, Usta T, Oral E. The COVID-19 pandemic and patients with endometriosis: A survey-based study conducted in Turkey. Int J Gynaecol Obstet. 2020 Aug 4. doi: 10.1002/ijgo.13339.
- Kaya C, Usta T, Baghaki HS, Oral E. Relation between educational reliability and viewer interest in YouTube® videos depicting endometrioma cystectomy surgical techniques. J Gynecol Obstet Hum Reprod. 2020 May 16:101808. doi: 10.1016/j.jogoh.2020.101808.
- Oral E, Sozen I, Uludag S, Demirkiran F, Ilvan S, Oncul M, Celik HG. The prevalence of endometrioma and associated malignant transformation in women over 40 years of age. J Gynecol Obstet Hum Reprod. 2020 May;49(5):101725. doi: 10.1016/j.jogoh.2020.101725.
- Parlatan U, Inanc MT, Ozgor BY, Oral E, Bastu E, Unlu MB, Basar G. Raman spectroscopy as a non-invasive diagnostic technique for endometriosis. Sci Rep. 2019 Dec 24;9(1):19795. doi: 10.1038/s41598-019-56308-y.
- Oral E, Inceboz U. How can we manage patients with endometriosis older than 40 years of age? Minerva Med. 2019 Dec 11. doi: 10.23736/S0026-4806.19.06377-8.
- Karacan T, Ozyurek E, Yesiralioglu S, Kiyak H, Usta T, Oral E. Endometriomas with low-risk malignancy potential in ultrasonography with high human epididymis protein 4 and risk of ovarian malignancy algorithm: a cases series, Gynecol Endocrinol., 2019 Aug 20:1-5, doi: 10.1080/09513590.2019.1653842.
- Oral E, Toksoy G, Sofiyeva N, Celik HG, Karaman B, Basaran S, Azami A, Uyguner ZO. Clinical and Genetic Investigation of Premature Ovarian Insufficiency Cases from Turkey. J Gynecol Obstet Hum Reprod., 2019 Apr 23, pii: S2468-7847(18)30508-7. doi: 10.1016/j.jogoh.2019.04.007.
- Oral E, Aydin O, Kumbak BA, İlvan S, Yilmaz H, Tustas E, Bese T, Demirkiran F, Arvas M. Concomitant endometriosis in malignant and borderline ovarian tumours. J Obstet Gynaecol., 2018 Nov.,38(8):1104-1109. doi: 10.1080/01443615.2018.1441815.
- Usta T., Karacan T., Hanli U., Cansu E., Oral E. Hysteroscopic management of a juvenile cystic adenomyosis, J Endometriozis and Pelvic Pain Disorders, 2018 Jun; vol10:123-123, doi:org/10.1177/228402651877879.
- Kaya C, Alay I, Guraslan H, Gedikbasi A, Ekin M, Ertaş Kaya S, Oral E, Yasar L. The Role of Serum Caspase 3 Levels in Prediction of Endometriosis Severity. Gynecol Obstet Invest. 2018 Aug 2:1-10. doi: 10.1159/000489494.
- Goksever Celik H, Karacan T, Kaya C, Uhri, M., Savkli, A. O., Yalcin Bahat, P., Altintas, T., Usta, T., Polat, I., Gorgen, H., Oral, E. Abdominal wall endometriosis: A monocentric continuous series and review of the literature. Journal of Endometriosis and Pelvic Pain Disorders. 2019;11(2):95-101. doi:10.1177/2284026519834465
- Sofiyeva N, Oral E. Letter from original author re. Does telomerase activity have an effect on infertility in patients with endometriosis? Methodological issues. Eur J Obstet Gynecol Reprod Biol. 2017 Sep; 216:259-260. doi: 10.1016/j.ejogrb.2017.07.009.
- Sofiyeva N, Ekizoglu S, Gezer A, Yilmaz H, Kolomuc Gayretli T, Buyru N, Oral E. Does telomerase activity have an effect on infertility in patients with endometriosis? Eur J Obstet Gynecol Reprod Biol. 2017 Jun; 213:116-122. doi: 10.1016/j.ejogrb.2017.04.027.
- Oral E, Aydogan Mathyk B, Aydogan BI, Acıkgoz AS, Erenel H, Celik Acıoglu H, Anık Ilhan G, Dane B, Ozel A, Tandogan B, Cakar E, Isci H, Kayan B, Aslan H, Ekiz A, Sancak S, Celik A, Yoldemir T, Uzun O, Erdogan MF. Iodine status of pregnant women in a metropolitan city which proved to be an iodine-sufficient area. Is mandatory salt iodisation enough for pregnant women? Gynecol Endocrinol. 2016;32(3):188-92. doi: 10.3109/09513590.2015.1101443. Epub 2015 Oct 22.
- Gezer A, Oral E. Progestin therapy in endometriosis. Womens Health (Lond). 2015 Aug;11(5):643-52. doi: 10.2217/whe.15.42. Epub 2015 Sep 21. Review.
- Oral E, Demir B, Inceboz U. Endometriosis and ovarian reserve. Womens Health (Lond). 2015 Aug;11(5):671-5. doi: 10.2217/whe.15.53. Epub 2015 Sep 7. Review. Inceboz U, Oral E. Foreword. Womens Health (Lond). 2015 Aug;11(5):575. doi: 10.2217/whe.15.61. Epub 2015 Sep 7.
- Sahmay S, Usta TA, Zebitay G, Senturk LM, Oral E, Ocal P, Idil M, Irez T. Comparison of follitropin alfa and urinary gonadotropins in IVF cycles. Minerva Ginecol. 2014 Aug;66(4):341-6.
- Elter K, Oral E. Surgical treatment before assisted reproductive technologies. Semin Reprod Med. 2014 Jul;32(4):253-61. doi: 10.1055/s-0034-1375177. Epub 2014 Jun 11. Review.
- Findikli N, Oral E. Time-lapse embryo imaging technology: does it improve the clinical results? Curr Opin Obstet Gynecol. 2014 Jun;26(3):138-44. doi: 10.1097/ GCO.0000000000000072. Review.
- Tuten A, Kucur M, Imamoglu M, Oncul M, Acikgoz AS, Sofiyeva N, Ozturk Z, Kaya B, Oral E. Serum YKL-40 levels are altered in endometriosis. Gynecol Endocrinol. 2014 May;30(5):381-4. doi: 10.3109/09513590.2014.887671. Epub 2014 Feb 17.
- Sahmay S, Guralp O, Aydogan B, Cepni I, Oral E, Irez T. Anti-Mullerian hormone and polycystic ovary syndrome: assessment of the clinical pregnancy rates in in vitro fertilization patients. Gynecol Endocrinol. 2013 May;29(5):440-3. doi: 10.3109/09513590.2013.769519. Epub 2013 Mar 6.
- Irez T, Usta TA, Zebitay G, Oral E, Senol H, Sahmay S. Evaluation of subgroups of the human sperm hypoosmotic swelling test in normozoospermic male cases with recurrent fertilization failure: a prospective case-controlled study. Arch Gynecol Obstet. 2013 Apr;287(4):797-801. doi: 10.1007/s00404-012-2634-6. Epub 2012 Nov 18.
- Kumbak B, Oral E, Bukulmez O. Female obesity and assisted reproductive technologies. Semin Reprod Med. 2012 Dec;30(6):507-16. doi: 10.1055/s-0032-1328879. Epub 2012 Oct 16. Review.
- Sahmay S, Demirayak G, Guralp O, Ocal P, Senturk LM, Oral E, Irez T. Serum anti-mullerian hormone, follicle stimulating hormone and antral follicle count measurement cannot predict pregnancy rates in IVF/ICSI cycles. J Assist Reprod Genet. 2012 Jul;29(7):589-95. doi:10.1007/s10815-012-9754-6. Epub 2012 Apr 11.
- Usta T, Oral E. Is the measurement of anti-Mullerian hormone essential? Curr Opin Obstet Gynecol. 2012 Jun;24(3):151-7. doi: 10.1097/GCO.0b013e3283527dcf. Review.
- Yoldemir T, Oral E. Has fertility declined in recent decades? Curr Opin Obstet Gynecol. 2012 Jun;24(3):119-26. doi: 10.1097/GCO.0b013e32835213f1. Review.
- Kucuk M, Halil S, Ocer F, Oral E. Labial fusion first diagnosed during pregnancy with voiding difficulty and its management: a case report. Clin Exp Obstet Gynecol. 2011;38(1):94-5.
- Cetinkaya F, Gelen SA, Kervancioglu E, Oral E. Prevalence of asthma and other allergic diseases in children born after in vitro fertilisation. Allergol Immunopathol (Madr). 2009 Jan-Feb;37(1):11-3.
- Kumbak B, Oral E. Quality of residual follicles may depend on the etiology of “declining” ovarian function? Fertil Steril. 2007 Nov;88(5):1480-1; author reply 1481.
- Oral E, Elter K. The impact of cesarean birth on subsequent fertility. Curr Opin Obstet Gynecol. 2007 Jun;19(3):238-43. Review.
- Kumbak B, Oral E, Karlikaya G, Lacin S, Kahraman S. Serum estradiol and beta- HCG measurements after day 3 or 5 embryo transfers in interpreting pregnancy outcome. Reprod Biomed Online. 2006 Oct;13(4):459-64.
- Kumbak B, Oral E, Kahraman S, Karlikaya G, Karagozoglu H. Young patients with diminished ovarian reserve undergoing assisted reproductive treatments: a preliminary report. Reprod Biomed Online. 2005 Sep;11(3):294-9.
- Oral E, Genç MR. Hormonal monitoring of the first trimester of pregnancy. Obstet Gynecol Clin North Am. 2004 Dec;31(4):767-78, x. Review.
- Aksu F, Gezer A., Oral E., Seventeen-year review of hysterectomy procedures in a university clinic in Istanbul (1985-2001) rch Obstet Gynecol, 2004.
- Oral E, Ilvan S, Tustas E, Korbeyli B, Kosebay D, Prevalence of endometriosis in malignant epithelial ovary tumours Research article Eur J Obstet Gynecol Reprod Biol. 2003 Jul;109(1):97-101.
- Oral E, Gezer A, Cagdas A, Pakkal N. Oxytocin Infusion in Labor: the effect different indications and the use of different diluents on neonatal bilirubin levels. Arch Gynecol Obstet. 2003 Jan;267(3):117-20.
- Oral E, Yetis O, Elibol F, Senol H, Irez T, Aksu FM. Assessment of human sperm morphology by strict criteria: comparison of wet preparation versus stained with the modified Diff-Quik method. Arch Androl. 2002 Jul-Aug;48(4):307-14.
- Oral E, Cağdaş A, Gezer A, Kaleli S, Öçer F, Perinatal and Maternal Outcomes of Fetal Macrosomia. Eur J Obstet Gynecol Reprod Biol. 2001 Dec; 99(2): 167-171.
- Oral E, Cağdaş A, Gezer A, Kaleli S, Aydin Y, Oçer F. Hematological abnormalities in adolescent menorrhagia. Arch Gynecol Obstet. 2002 Apr;266(2):72-4.
- Erel CT, Oral E, Senturk LM, Aksu MF. Craniopharyngioma and Bardet-Biedl syndrome. A case report. J Reprod Med. 2001 May;46(5):501-3.
- Akçay T, Dinçer Y, Kayali R, Colgar U, Oral E, Cakatay U. Effects of hormone replacement therapy on lipid peroxides and oxidation system in postmenopausal women. J Toxicol Environ Health A. 2000 Jan 14;59(1):1-5.
- Sahmay S, Kaleli S, Oral E, Alper T, Unal O, Karacan I, Atasu T. Effect of different types of intrauterine devices on intrauterine activity. Int J Fertil Womens Med. 1999 May-Jun;44(3):150-5.
- Öçer F, Kaleli S, Budak E, Oral E. Fetal Weight Estimation and Prediction of Fetal Macrosomia in Nondiabetic Pregnant Women Research article. Eur J Obstet Gynecol Reprod Biol.1999 Mar; 83(1):47-52.
- Erel CT, Senturk LM, Oral E, Mutlu H, Colgar U, Seyisoglu H, Ertungealp E. Results of the ACTH stimulation test in hirsute women. J Reprod Med. 1999 Mar; 44(3):247-52.
- Bahtiyar MO, Seli E, Oral E, Senturk LM, Zreik TG, Arici A. Follicular fluid of women with endometriosis stimulates the proliferation of endometrial stromal cells. Hum Reprod. 1998 Dec;13(12):3492-5.
- Kaleli S, Erel CT, Oral E, Elter K, Akman C, Colgar U. Ovarian stromal hypertrophy in polycystic ovary syndrome. J Reprod Med. 1998 Oct;43(10):893-7.
- Erel CT, Senturk LM, Oral E, Colgar U, Ertungealp E. Adrenal androgenic response to 2-hour ACTH stimulation test in women with PCOS. Gynecol Endocrinol. 1998 Aug;12(4):223-9.
- Zeyneloglu HB, Senturk LM, Seli E, Oral E, Olive DL, Arici A. The role of monocyte chemotactic protein-1 in intraperitoneal adhesion formation. Hum Reprod. 1998 May;13(5):1194-9.
- Arici A, Seli E, Senturk L,Gutierrez L, Oral E, Taylor H, Interleukin-8 in the Human Endometrium The Journal of Clinical Endocrinology & Metabolism, Volume 83, Issue 5, 1 May 1998, Pages 1783–1787.
- Arici A, Seli E, Zeyneloglu HB, Senturk LM, Oral E, Olive DL. Interleukin-8 induces proliferation of endometrial stromal cells: a potential autocrine growth factor. J Clin Endocrinol Metab. 1998 Apr;83(4):1201-5.
- Oral E, Seli E, Bahtiyar MO, Jones EE, Arici A. Growth-regulated alpha expression in human preovulatory follicles and ovarian cells. Am J Reprod Immunol. 1997 Jul; 38(1):19-25.
- Arici A, Oral E, Attar E, Tazuke S, Olive D. Monocyte chemotactic protein-1 concentration in peritoneal fluid of women with endometriosis and its modulation of expression in mesothelial cells Research article Fertil Steril. 1997 Jun; 67(6):1065-72.
- Arici A, Oral E, Bahtiyar O, Engin O, Seli E, Jones EE. Leukaemia inhibitory factor expression in human follicular fluid and ovarian cells. Hum Reprod. 1997 Jun;12(6):1233-9.
- Oral E, Arici A. Pathogenesis of Endometriosis, Research article Obstetrics and Gynecology Clinics of North America, 1997 Jun; 24(2): 219-233.
- Arici A, Oral E, Bukulmez O, Buradagunta S, Bahtiyar O, Jones EE. Monocyte chemotactic protein-1 expression in human preovulatory follicles and ovarian cells. J Reprod Immunol. 1997 Feb;32(3):201-19.
- Oral E, Seli E, Bahtiyar MO, Olive DL, Arici A Growth-regulated alpha expression in the peritoneal environment with endometriosis. Obstet Gynecol. 1996 Dec;88(6): 1050-6.
- Erel CT, Kaleli S, Oral E, Engür A, Eren T, Calay Z, Aydinli K. DNA ploidy of ectopic pregnancy and first trimester spontaneous abortion investigated by flow cytometry. Acta Obstet Gynecol Scand. 1996 Nov;75(10):881-5.
- Oral E, Arici A, Olive D, Huszar G. Peritoneal fluid from women with moderate or severe endometriosis inhibits sperm motility: the role of seminal fluid components Research article Fertil Steril. 1996 Nov; 66(5):787-792.
- Arici A, Oral E, Bukulmez O, Buradagunta S, Engin O, Olive DL. Interleukin-8 expression and modulation in human preovulatory follicles and ovarian cells. Endocrinology. 1996 Sep;137(9):3762-9.
- Oral E, Olive DL, Arici A. The peritoneal environment in endometriosis. Hum Reprod Update. 1996;2(5):385-398.
- Oral E, Arici A. Peritoneal growth factors and endometriosis Semin Reprod Endocrinol. 1996;14(3):257-67.
- Arici A, Oral E, Bukulmez O, Duleba A, Jones E The effect of endometriosis on implantation: results from the Yale University in vitro fertilization and embryo transfer program Research article Fertil Steril. 1996 Mar; 65(3): 603-607.
- Sahmay S, Oral E, Saridogan E, Senturk L, Atasu T. Endometrial biopsy findings in infertility: analysis of 12,949 cases. Int J Fertil Menopausal Stud. 1995 Nov-Dec; 40(6):316-21.
- Endometriosis and Adenomyosis: Global Perspectives Across the Lifespan; Springer International Publishing; 2022; ISBN978-3-030-97236-3
- Kale, A., Gündoğdu, E. C., Keleş, E., Baydılı, K. N., Asta, T. A., Kale, E., Çokay, D., Unlugedik Sayın, E., & Oral, E. (2024). Quality of life, bowel and urinary functions after surgery for bowel endometriosis. Haydarpaşa Numune Medical Journal, 64(3), 391-397. https://doi.org/10.14744/hnhj.2023.59329
- Kale, A., Kuru, B., Baydili, K. N., Cokay, D., Basol, G., Gundogdu, E. C., Mat, E., Ertugrul, I., Altuntas, Y. E., & Usta, A. T. (2022). Combination of laparoscopic side-to-end colorectal anastomosis and vaginal natural orifice specimen extraction surgery for colorectal endometriosis: Technique and outcomes. Journal of Endometriosis and Pelvic Pain Disorders, 14(3), 149-157.
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- Pinar Ozcan, Bulut Varli, Necati Findikli, Murat Basar, Engin Oral. Management of Infertility, A Practical Approach, Chapter 22 – Oocyte quality evaluation and cryopreservation, 2023, https://doi.org/10.1016/B978-0-323-89907-9.00004-1.
