Prof. Dr. Ahmet Demir

Prof. Dr. Ahmet Demir completed his medical education at Hacettepe University Faculty of Medicine and his specialization in Obstetrics and Gynecology at Dokuz Eylül University.

He has served as the Head of IVF Units at leading tertiary hospitals in Türkiye, including İzmir City Hospital and Tepecik Training and Research Hospital.

With extensive experience in assisted reproductive technologies, ovarian reserve, azoospermia-related IVF outcomes, embryo transfer, and reproductive endocrinology, he has contributed to numerous international peer-reviewed publications.

Prof. Dr. Demir is a member of ESHRE (European Society of Human Reproduction and Embryology) and several national scientific associations. He has also supervised multiple medical specialty theses in IVF and infertility.

His clinical focus areas include:

• IVF & ICSI treatments
• Poor ovarian reserve
• Azoospermia
• Recurrent implantation failure
• Advanced reproductive technologies

Education

• 2002 – 2006 Medical Specialization, Dokuz Eylül University, Department of Obstetrics and Gynecology
• 1995 – 2001 Hacettepe University, Faculty of Medicine

Work Experience

• 2023 – 2026 – Head Physician of In Vitro Fertilization Unit, Izmir City Hospital
• 2017 – 2023 – Head Physician of the In Vitro Fertilization Unit, Tepecik Training and Research Hospital, Health Sciences University.
• 2016 – İzmir Tepecik Training and Research Hospital, Training Officer
• 2011 – 2016 – Elazığ Training and Research Hospital, Training Officer
• 2011-2016 – Elazığ Training and Research Hospital, Training and Administrative Manager
• 2010 – 2011 – Elazığ Training and Research Hospital, Chief Assistant
• 2007 – 2010 – Mardin Obstetrics and Gynecology and Pediatric Diseases Hospital, Compulsory State Service
• 2008 – 2009 – Derince Military Hospital, Military Service
• 2006 – 2007 – Dokuz Eylül University, Department of Obstetrics and Gynecology
• 2002 – 2006 – Dokuz Eylül University, Department of Obstetrics and Gynecology

Activities in Scientific Journals

• The predictive value of early B-hcG levels after embryo transfer in in vitro fertilization treatment. Gürbüz E, Balcı MF, Köse C, Güleç EŞ, Kasap E, Demir A. Niger J Clin Pract. 2026 Jan 1;29(1):66-71. doi: 10.4103/njcp.njcp_124_25. Epub 2026 Feb 3.
• Interobserver Variability in Hysterosalpingography Interpretation: Radiologists vs Gynecologists. Karadag C, Gurses C, Kabaalioglu A, Gurses B, Güzelmansur İ, Daplan T, Turan A, Artas H, Tutus S, Olgan S, Col Madendag İ, Demir A, Mumusoglu S, Aydin Y, Pabuccu EG. International Journal of Women’s Health. 2025;17:3429–3435. doi: 10.2147/IJWH.S555065.
• In-depth analysis of the demographic landscape and clinical outcomes of assisted reproductive technologies in Türkiye: a comprehensive survey for the years 2020 and 2021. Benlioğlu C, Aydın Y, Bostancı MS, Bozdağ G, Bulgurcuoğlu S, Demir A, Dilbaz S, Dirican EK, Erdem A, Ergin E, Göksever Çelik H, Güler İ, Gürbüz AS, Işıkoğlu M, Kahraman S, Mumuşoğlu S, Özgür K, Şimşek E, Şükür YE, Turan V, Ata B. Journal of the Turkish German Gynecological Association. 2025;26(2):109–115. doi: 10.4274/jtgga.galenos.2025.2025-2-1.
• Effect of ovarian reserve on pregnancy outcomes in patients undergoing IVF treatment due to azoospermia. Arabacı AS, Köse C, Güleç ES, Demir A. Int Urol Nephrol. 2025 Aug;57(8):2457-2462. doi: 10.1007/s11255-025-04412-6.
• Placental mapping in pregnancies following fresh and frozen embryo transfer and associations with obstetric outcomes. Şahin GD, Demir A, Kasap E, Güleç ES, Köse C. Bratisl Med J. 2025;126:1388–1397. doi: 10.1007/s44411-025-00152-2.
• Can ultrasound elastography be useful in the diagnosis of poor ovarian response? Güleç EŞ, Gür BE, Kurtulmuş KS, Kaygun CB, Kasap E, Demir A. J Clin Ultrasound. 2025 Jan;53(1):90-96. doi: 10.1002/jcu.23827.
• Demographic distributions and clinical results of assisted reproduction techniques in Turkey in 2019: a descriptive survey. Benlioğlu C, Aydın Y, … Demir A, … Ata B. J Turk Gynecol Assoc. 2024 Mar 6;25(1):18-23. doi: 10.4274/jtgga.galenos.2023.2023-3-12.
• Which combination causes less inflammatory response during laparoscopic hysterectomy? Ligature plus monopoly cautery or harmonic plus bipolar cautery? Toz E, Kanmaz AG, İnan AH, Karaca İ, Karaca S, Demir A. Pak J Med Sci. 2023 Sep-Oct;39(5):1326-1331. doi: 10.12669/pjms.39.5.7668.
• Effect of ovarian reserve on pregnancy outcomes in patients undergoing IVF treatment. Arabacı A, Köse C, Kasap E, Güleç EŞ, Demir A. Int Urol Nephrol. 2023 Feb 21. doi: 10.1007/s11255-025-04412-6.
• The association between cervical HPV and female fertility. İleri A, Karaca İ, Karaca YS, İleri H, Ata C, Özer P, Demir A. Aegean Journal of Obstetrics and Gynecology. 2023;5(2):41-43. doi: 10.46328/aejog.v5i2.158.
• GnRH agonist administration as luteal support on the transfer day of single blastocyst in dual triggered cycles. Demir A, Köse C, Güleç EŞ, Türkmen P, Töz E, Peker N. Ginekol Pol. 2022 Aug. doi: 10.5603/GP.a2022.0082.
• Does the addition of oral dydrogesterone to vaginal progesterone gel in luteal phase support affect IVF-ICSI results? Cegilli OB, Güleç EŞ, Bayraktar B, Köse C, Demir A. Kuwait Med J. Published online Jul 26, 2022.
• Demonstration of the Epigastric Vessels Surface Anatomy with Equation Model: An Anatomical Feasibility Study. Karaca SY, İnce O, Adıyeke M, İleri A, Vural T, Töz E, Demir A, Karaca İ, Pulur A, Ertaş İ. E-Journal of the Anatomical Society of India. 2022;71(2):123-127. doi: 10.4103/jasi.jasi_207_21.
• Does Maternal Vitamin D Level Affect the Ovarian Reserve of Female Newborn Infants? Güleç EŞ, Gür EB, Kurtulmuş S, Basok Bİ, Ozmus DC, İyilikçi V, Demir A. Fetal Pediatr Pathol. 2022 Dec;41(6):987-995. doi: 10.1080/15513815.2022.2092667.
• Does Follicle-Stimulating Hormone Receptor Polymorphism Status Affect In Vitro Fertilization–Intracytoplasmic Sperm Injection Results and Live Birth Rate? A Retrospective Study. Bayraktar B, Güleç EŞ, Kutbay BK, Köse C, Gür EB, Demir A. J Hum Reprod Sci. 2022 Jan-Mar;15(1):58-63. doi: 10.4103/jhrs.jhrs_165_21.
• Letrozole as an adjunct treatment in antagonist cycles that previously failed in poor responders. Kacar TM, Biler A, Köse C, Güleç EŞ, Demir A. Ginekol Pol. 2022;93(4):267-272. doi: 10.5603/GP.a2021.0116.
• Impact of Obesity, Visceral Adiposity and Metabolic Syndrome on Male Fertility. Gür EB, Güleç EŞ, İnce S, Keskin MZ, Demir A, Sengul B, Gür MS. Gynecol Obstet Reprod Med. 2021;27(3):260-267. doi: 10.21613/GORM.2021.1156.
• Perioperative complications and short-term outcomes of abdominal sacrocolpopexy, laparoscopic sacrocolpopexy, sacrospinous ligament fixation, and iliococcygeus fixation procedures. Biler A, Ertaş İE, Tosun G, Hortu İ, Demir A, Taner CE, Özeren M, Şendağ F. Turk J Med Sci. 2018;48:602-610. doi: 10.3906/sag-1712-203.
• Adolescent Pregnancies and Perinatal Outcomes; A study at tertiary hospital at the eastern part of Turkey. Peker N, Demir A, Ceyda A, Biler A, Baki E. Clinical and Experimental Obstetrics & Gynecology. 2018;45(3). doi: 10.12891/ceog3904.2018.
• Associations of Maternal Vitamin B12 Concentration in Pregnancy With the Risks of Preterm Birth and Low Birth Weight: A Systematic Review and Meta-Analysis of Individual Participant Data. Rogne T, Tielemans MJ, Chong MF, Yajnik CS, Krishnaveni GV, Poston L, Jaddoe VW, Steegers EA, Joshi S, Chong YS, Godfrey KM, Yap F, Yahyaoui R, Thomas T, Hay G, Hogeveen M, Demir A, Saravanan P, Skovlund E, Martinussen MP, Jacobsen GW, Franco OH, Bracken MB, Risnes KR. Am J Epidemiol. 2017. doi: 10.1093/aje/kww212.
• Spontaneous Rupture of Splenic Artery Aneurysm during the Third Trimester of Pregnancy. Peker N, Vicdanlı HN, Demir A, Bozan MB, Gündoğan S. Case Rep Perinat Med. 2017;6(1):20160054. doi: 10.1515/crpm-2016-0054.
• Cesarean Myomectomy: Is it a Safe Procedure? Peker N, Demir A. Gazi Med J. 2017;28:249-251. doi: 10.12996/gmj.2017.75.
• Robotic Total Hysterectomy: Initial experience in a tertiary center. Biler A, Solmaz U, Gökçü M, Mat E, Ekin A, Demir A. Gazi Med J. 2017;28:93-97. doi: 10.12996/gmj.2017.27.
• Laparoscopy versus laparotomy for management of endometrial carcinoma in morbidly obese patients: a prospective study. Bige Ö, Demir A, Saatli HB, Koyuncuoğlu ÜM, Saygılı U. J Turk Ger Gynecol Assoc. 2015;16(4):164-169. doi: 10.5152/jtgga.2015.
• Is Intracytoplasmic Sperm Injection Success Affected by the Testicular Histopathology in Nonobstructive Azoospermic Patients? Karakoç SL, Köse M, Demir A, Bozdağ G, Gököz Ö, Günalp GS. J Reprod Med. 60(7-8):309-314.
• Histopathology of ipsilateral and contralateral ovaries and plasma interleukin 6 levels after unilateral ovarian torsion. Karakoç SL, Hacıvelioğlu SÖ, Demir A, Köse M, Kaymaz FF, Çakır DÜ, Bozdağ G. Clin Exp Obstet Gynecol. 2016;43(1):82-87.
• Manual versus computer-automated semen analysis. Köse M, Karakoç SL, Demir A, Bozdağ G, Günalp GS. Clin Exp Obstet Gynecol. 2014;41(6):662-664. doi: 10.12891/ceog18102014.
• Can combination of Day 3 and Day 5 embryo morphology be useful to predict pregnancy in in vitro fertilization cycles? Demir A, Köse M, Bozdağ G, Karakoç SL, Sever A, Günalp GS. Clin Exp Obstet Gynecol. 2014;41(6):685-688. doi: 10.12891/ceog17232014.
• Effect of Follicular Fluid Oxidative Stress on Subsequent Oocyte Quality and Embryo Development. Bige Ö, Gülekli B, Demir A, Göde ÇF, Koçtürk AS, Aydıner F, Özkaya AB, Şimşek KH. Türkiye Klinikleri Jinekoloji Obstetri Dergisi. doi: 10.5336/gynobstet.2014-41089.
• Effect of Fetal Gender on Angiogenesis: Analysis of Angiogenin and Leptin Levels in Second Trimester Amniotic Fluids. Demir A, Bige Ö, Çağlıyan E, Solak A, Güçlü S. Türkiye Klinikleri Jinekoloji Obstetri Dergisi. 24(1):16-19.
• Can uterine artery Doppler parameters predict copper intrauterine device-induced side effects? Mutlu İ, Demir A, Mutlu MF. Eur J Contracept Reprod Health Care. 2014;19(1):51-56. doi: 10.3109/13625187.2013.856405.
• Cesarean Section Rates Determined in Our Clinic Between 2009–2012: Is the Increase in Cesarean Section Rates Inevitable? Mutlu İ, Mutlu MF, Demir A, Efetürk T, Kiseli M. Gazi Med J. 2013;24(2):40-43. doi: 10.12996/gmj.2013.11.
• Do amniotic fluid leptin levels decrease in pregnancies with fetal trisomy 21? Demir A, Saatli HB, Çağlıyan E, Solak A. J Obstet Gynaecol. 2012;32(6):540-542. doi: 10.3109/01443615.2012.693989.
• Analysis of perinatal outcome by combination of first trimester maternal plasma homocysteine with uterine artery Doppler velocimetry. Kaymaz C, Demir A, Bige Ö, Çağlıyan E, Çımrın D, Demir N. Prenat Diagn. 2011;31(13):1246-1250. doi: 10.1002/pd.2874.
• Frozen section diagnoses of 578 ovarian tumors made by pathologists with and without expertise on gynecologic pathology. Bige Ö, Demir A, Saygılı U, Göde F, Uslu T, Koyuncuoğlu ÜM. Gynecol Oncol. 2011;123(1):43-46. doi: 10.1016/j.ygyno.2011.06.030.
• Amniotic fluid angiogenin levels are decreased in pregnancies with fetal trisomy 21. Demir A, Güçlü S, Bige Ö, Solak A, Demir N. Prenat Diagn. 2011;31(11):1101-1103. doi: 10.1002/pd.2830.
• Collision tumor: serous cystadenocarcinoma and dermoid cyst in the same ovary. Bige Ö, Demir A, Koyuncuoğlu ÜM, Seçil M, Ulukuş EÇ, Saygılı U. Arch Gynecol Obstet. 2009;279(5):767-770. doi: 10.1007/s00404-008-0781-6.
• Prospective comparison of tissue trauma after laparoscopic hysterectomy types with retroperitoneal lateral transsection of uterine vessels using ligasure and abdominal hysterectomy. Demir A, Bige Ö, Saatli HB, Solak A, Saygılı U, Önvural A. Arch Gynecol Obstet. 2008;277(4):325-330. doi: 10.1007/s00404-007-0485-3.
• Effect of fetal gender on maternal serum human chorionic gonadotropin levels throughout pregnancy. Göl M, Güçlü S, Demir A, Erata YE, Demir N. Arch Gynecol Obstet. 2006;273(2):90-92. doi: 10.1007/s00404-005-0036-8.
• Anesthetic Effect of Intrauterine Lidocaine Plus Naproxen Sodium in Endometrial Biopsy. Doğan ÖE, Celiloğlu M, Sarıhan E, Demir A. Obstet Gynecol. 2004;103(2):347-351. doi: 10.1097/01.AOG.0000109519.74229.30.
• Utilization of Health Services by the People 65 Years of Age and Older in Gulveren Region, Ankara. Özcebe H, Sönmez R, Atasoy A, Dede Ö, Demir A, Fakıoğlu E, Yılmaz N. Geriatri. 2003;6(1):22-26.

1. Papers Presented at International Scientific Meetings and Published in Conference Proceedings

• Impact of visceral obesity on sex hormones and semen quality. Gür BE, Şahin GE, İnce S, Keskin MZ, Gür SM, Demir A, Şengül B. XII. Turkish German Gynecology Congress, 2018, Girne, 9–10.
• Laparoscopy versus laparotomy for management of endometrial carcinoma in morbidly obese patients: a prospective study. Bige Ö, Saatli B, Demir A, Koyuncuoğlu M, Saygılı UX. Turkish German Gynecology Congress, 2014, Antalya, 288–289.
• Can uterine artery Doppler parameters predict copper intrauterine device-induced side effects? Mutlu MF, İlknur M, Demir A, Efetürk T. SGI Summit Turkey, 2013, 31–32.
• Can combination of day 3 and day 5 embryo morphology be useful to predict pregnancy in in vitro fertilization cycles? Demir A, Bozdağ G, Karakoç SL, Sever A, Esinler İ, Günalp GS. A Conjoint Meeting of the International Federation of Fertility Societies and the American Society for Reproductive Medicine (IFFS/ASRM), 2013;100(35):509–509.
• Histopathological analysis of testicular specimen from non-obstructive azoospermic patients. Günalp GS, Karakoç SL, Köse M, Bozdağ G, Sever A, Demir A. A Conjoint Meeting of the International Federation of Fertility Societies and the American Society for Reproductive Medicine (IFFS/ASRM), 2013;100(35):213–213.
• Comparison of leptin levels as an indicator of angiogenesis in second trimester amniotic fluids of fetuses with trisomy 21 and normal karyotype. Demir A, Güçlü S, Bige Ö, Demir N, Solak A. 8th World Congress of Perinatal Medicine, 2007;35:147–148. doi: 10.1515/JPM.2007.108.
• Analysis of second trimester amniotic fluid angiogenin levels in fetuses with normal karyotype and with trisomy 21. Demir A, Güçlü S, Bige Ö, Demir N, Solak A. 8th World Congress of Perinatal Medicine, 2007;35:147–147. doi: 10.1515/JPM.2007.108.
• Analysis of different types of laparoscopic hysterectomy with retroperitoneal lateral transsection of uterine arteries using ligation: Dokuz Eylül University experience. Demir A, Saatli HB, Bige Ö, Saygılı U. VII. International Congress of the Turkish-German Gynecological Association, May 2007;275:115–115.
• Effects of postmenopausal hormone therapy on leiomyoma and uterine artery Doppler indices: one-year prospective study comparing two regimens. Altındağ T, Bige Ö, Doğan ÖE, Demir A, Celiloglu M. VII. International Congress of the Turkish-German Gynecological Association, May 2007;275:164–164.

1. Articles Published in National Peer-Reviewed Journals

• Factors Affecting Labor Induction in Late-Term Pregnancies. Peker N, Demir A, Bütün Z, Biler A, Gündoğan S. Okmeydanı Medical Journal. 2017;33(4):194-198. doi: 10.5222/otd.2017.1120.
• The role of computed tomography in necrotizing fasciitis developing after cesarean section: Case report. Artaş H, Demir A, Doğan Z, Kavak SB, Artaş G. Fırat University Journal of Health Sciences. 28(2):73-75.
• Endometrioma mimicking ovarian cancer with very high serum CA 125 and CA19-9 levels. Peker N, Demir A, Bige Ö. Basic and Clinical Sciences. 2(4):170-173. doi: 10.12808/bcs.v2i4.1033000043.

1. Papers presented at national scientific meetings and published in proceedings books.

• Gonadotropin versus gonadotropin/letrozol protocol in patients with poor prognosis and failed antagonist cycles. Demir A, Köse C, Güleç EŞ, Karakolcu K, Kaçar MT. 19th National Gynecology and Obstetrics Congress, 2022, Antalya.
• Comparison of outcomes with the addition of letrozole to antagonist treatment cycles in patients with low ovarian reserve. Kaçar MT, Biler A, Köse C, Güleç EŞ, Demir A. 19th National Gynecology and Obstetrics Congress, 2022, Antalya.
• Complete uterine and vaginal septum: Management of a case with recurrent pregnancy loss. Gürbüz E, Demir A. 19th National Gynecology and Obstetrics Congress, 2022, Antalya.
• Use of FSH receptor gene polymorphism as an ovarian response marker in women with low ovarian reserve. Yılmaz E, Güleç ŞE, Özyılmaz B, Demir A, Kutbay BY. 2nd Academy of Reproductive Endocrinology and Infertility, 2018, Uludağ.
• Robot-assisted tubal reanastomosis. Solmaz U, Biler A, Demir A. 1st Young Endoscopists Platform Symposium, January 2017, Antalya.
• Robotic hysterectomy and sacrocolpopexy. Biler A, Solmaz U, Demir A. 1st Young Endoscopists Platform Symposium, January 2017, Antalya.
• Retrospective evaluation of cases undergoing myomectomy during cesarean section: Our experience in a tertiary hospital. Peker N, Demir A, Biler A. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• Adolescent pregnancies: maternal and perinatal outcomes. Peker N, Demir A, Aydın C, Biler A, Gündoğan S. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• Factors affecting the success of labor induction in late term pregnancies. Peker N, Demir A, Bütün Z, Biler A, Gündoğan S. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• A case of parasitic myoma located in the ovary. Biler A, Gölbaşı H, Gölbaşı C, Demir A, Özeren M. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• Cesarean scar pregnancy. Tutar SO, Şengül B, Biler A, Demir A, Mart E, Özeren M. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• Pelvic mass originating from giant myoma. Şengül B, Tutar SO, Mart E, Baysal MC, Demir A, Özeren M. 14th National Gynecology and Obstetrics Congress, October 2016, Antalya.
• Accuracy of intraoperative frozen section in diagnosis of ovarian tumors: The role of pathologist. Bige Ö, Karakuş S, Demir A, Göde F, Koyuncuoğlu ÜM. 8th National Gynecology and Obstetrics Congress, May 2010, Antalya.
• Comparison of neonatal morbidity effects after nifedipine and ritodrin tocolysis in threatened preterm labor. Karakulak M, Pala HG, Demir A, Günay T, Güçlü S. 6th National Gynecology and Obstetrics Congress, May 2008, Antalya.
• Prospective evaluation of tissue trauma after laparoscopic hysterectomy performed using retroperitoneal lateral transsection of uterine vessels with Ligasure. Demir A, Saatli HB, Bige Ö, Solak A, Saygılı U, Önvural A. II. Gynecological Endoscopy Congress, April 2007, İzmir.

1. Written Book Chapters

• Current Book of Reproductive Endocrinology, Surgery and Infertility III (2022). Editor: Prof. Dr. Erol Tavmergen. Chapter 55: Approach to Intrauterine Adhesions, Principles of Synechiolysis.
• Gynecology and Obstetrics (2019). Editors: Assoc. Prof. Dr. İbrahim Alanbay, Prof. Dr. Emre Karaşahin. Chapter 31: Operative Vaginal Delivery.

Memberships in Scientific Organizations

• Aegean Women’s Health Association, Vice President (Founding Member), 2020
• European Society of Human Reproduction and Embryology (ESHRE), Member, 2017
• Gynecological Endoscopy Association (JED), Member, 2015
• Turkish Society for Reproductive Health and Infertility (TSRM), Member, 2014
• Turkish Society of Gynecology and Obstetrics (TJOD), Member, 2008

Certificates and Courses

• NRP practitioner training, Neonatal resuscitation program, Provincial Health Directorate, Certificate, 19.10.2010-21.10.2010.
• Laboratory Animal Use Certificate Program, Laboratory Animal Use, Hacettepe University, Certificate, 08.06.2013 – 16.06.2013.
• Certificate in Assisted Reproductive Technology Training, IVF training, Hacettepe University, Certificate, 02.01.2013 – 02.07.2013.
• Gynecological Laparoscopic Surgery Training Program, Laparoscopic Surgery, Acıbadem University, Course, 17.12.2015 – 18.12.2015.
• Da Vinci Robotics System Training Certification, Acıbadem University, March 31, 2017.

Supervised Theses – Medical Specialization 2025 – Çağla Ezgi Uğuz Candemir: Evaluation of the endometrium with shear wave elastography in in vitro fertilization (IVF) treatment of unexplained infertility and its role in predicting pregnancy outcomes. Health Sciences University → Izmir City Hospital → Department of Obstetrics and Gynecology . 2024 – Aycan Sıkı: The effect of ovarian reserve on pregnancy outcomes in patients undergoing IVF treatment due to azoospermia. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology . 2023 – Emir Gürbüz: The effect of β-hCG levels measured early after embryo transfer in IVF treatment on pregnancy prognosis. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology . 2023 – Berna Kolbaşı: The effect of pre-procedure video patient information on anxiety levels in primary infertile patients undergoing intrauterine insemination. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology 2023 – Efe Ahmet Özden The effect of smoking on pregnancy success in individuals undergoing IVF treatment with unexplained infertility. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology 2021 – Doğay Nurtaç Özmüş The effect of estrogen and estrogen-GnRH-a protocols on pregnancy outcomes in endometrium preparation during frozen embryo transfer and comparison with fresh blast transfer results. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology 2021 – Gonca Demirel Şahin Determination of placental implantation site in IVF pregnancies and its effect on perinatal outcomes. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology 2019 – Melek Turaç Kaçar Retrospective evaluation and comparison of IVF results in patients with low ovarian reserve who underwent two or more in vitro fertilization attempts. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology 2019 – Pınar Metin Retrospective comparison of pregnancy outcomes of freeze-thaw cycles compared to fresh transfer cycles in patients who underwent high-response blastocyst transfer at the Tepecik Training and Research Hospital IVF clinic. Health Sciences University → Izmir Tepecik Training and Research Hospital → Department of Obstetrics and Gynecology