Gynecology & Obstetrics · Acibadem Altunizade Hospital, İstanbul Prof. Ahmet Tayyar, MD
✓ Medically verified profileProf. Ahmet Tayyar, MD
Prof. Ahmet Tayyar, MD is a gynecology and obstetrics specialist focused on perinatology and high-risk pregnancies at Acibadem Altunizade Hospital in İstanbul. He provides detailed pregnancy ultrasound, amniocentesis, pregnancy monitoring and delivery planning, and manages gestational diabetes, preeclampsia, placenta previa, placenta accreta and fetal treatment and surgery. He consults in Turkish and English.
Accepting international patientsAbout Prof. Ahmet Tayyar, MD
Prof. Ahmet Tayyar, MD is a gynecology and obstetrics specialist at Acibadem Altunizade Hospital in İstanbul, where he works in the Gynecology & Obstetrics unit. His clinical focus is perinatology and high-risk pregnancies. He has more than 21 years in medicine and is a member of the Turkish Maternal-Fetal Medicine and Perinatology Association.
Dr. Tayyar graduated from Ankara University Faculty of Medicine in 2005 and completed his specialty training in Obstetrics and Gynecology at Erciyes University Faculty of Medicine in 2011. He then worked at the Obstetrics and Gynecology Clinic of Niğde State Hospital from 2011 to 2013. From 2013 to 2016 he was at King`s College Hospital NHS Foundation Trust, Department of Obstetrics, Harris Birthright Research Center For Fetal Medicine – Fetal Medicine Research Institute, London, England, where he completed his training as a perinatology subspecialist in 2016. Between 2016 and 2018 he worked in the Perinatology Clinic of İstanbul Health Sciences University Kanuni Sultan Süleyman Training and Research Hospital. In 2018 he became an Associate Professor at İstanbul Medipol University Faculty of Medicine, Department of Obstetrics and Gynecology, and from 2018 to 2020 he worked in the Perinatology Clinic of Medipol Mega University Hospital. He joined Acıbadem Healthcare Services in 2020. His published research includes studies on screening for preeclampsia using mean arterial pressure and uterine artery pulsatility index, maternal serum markers in preeclampsia and intrahepatic cholestasis of pregnancy, fetal cardiac function in congenital diaphragmatic hernia, and outcomes of intrauterine transfusion for fetal anemia.
Clinical focus
Dr. Tayyar follows women through pregnancy, with particular attention to pregnancies considered high risk. His work includes detailed ultrasound during pregnancy, amniocentesis, and ongoing pregnancy monitoring. He manages maternal conditions such as gestational diabetes and preeclampsia, and treats placental disorders including placenta previa and placenta accreta.
His practice also covers fetal treatment and surgery for selected fetal conditions. As part of delivery planning, he discusses the options that may be appropriate for each patient, including epidural delivery, cesarean delivery, and water birth. Which approach is suitable depends on the course of the individual pregnancy and is decided together with the patient after review of the clinical findings.
How Dr. Tayyar works with international patients
Dr. Tayyar consults in Turkish and English, and interpreters can be arranged for patients who speak other languages. Before a visit, the Acibadem international patient team coordinates the collection of prior reports and imaging, such as ultrasound reports, laboratory and pathology results, operative notes and discharge summaries, arranges appointments and organizes the hospital visit. A first consultation typically covers the patient’s history and symptoms, a review of existing imaging and previous treatments, a clinical examination and a discussion of the available options. Video consultation is available for international patients who wish to discuss their pregnancy findings or prior reports before traveling.
What Dr. Tayyar treats and performs
Each item opens the condition or treatment page with the care pathway for international patients.
Areas of practicePerinatology and high-risk pregnancies
Conditions treated
- Gestational diabetes
- Placenta previa treatment
- Placenta accreta treatment
- Preeclampsia
- Delivery planning
Education, career and memberships
Education & training
Education
- 2018İstanbul Medipol University Faculty of Medicine / Department of Obstetrics and Gynecology / Associate Professor Doctor
- 2016King`s College Hospital NHS Foundation Trust, Department of Obstetrics, Harris Birthright Research Center For Fetal Medicine - Fetal Medicine Research Institute, London, England / Perinatology Subspecialist
- 2011Erciyes University Faculty of Medicine Obstetrics and Gynecology
- 2005Ankara University Faculty of Medicine
Career
Professional Experience
- 2020Acıbadem Healthcare Services
- 2018–2020Medipol Mega University Hospital / Department of Obstetrics and Gynecology / Perinatology Clinic
- 2016–2018İstanbul Health Sciences University Kanuni Sultan Süleyman Training and Research Hospital / Perinatology Clinic
- 2013–2016King`s College Hospital NHS Foundation Trust, Department of Obstetrics, Harris Birthright Research Center For Fetal Medicine - Fetal Medicine Research Institute, London, England
- 2011–2013Niğde State Hospital / Obstetrics and Gynecology Clinic
Memberships
Professional Memberships
- Turkish Maternal-Fetal Medicine and Perinatology Association
Selected publications
Selected Publications
- Maternal serum galectin-1 and galectin-3 levels in pregnancies complicated with preterm prelabor rupture of membranes The Journal of Maternal-Fetal & Neonatal Medicine, 2020, 33:5, 861-868, DOI: 10.1080/14767058.2019.1637409 Kaya B, Turhan U, Sezer S, Kaya S, Dag I, Tayyar A.
- Type 4 laryngotracheoesophageal cleft detected during fetoscopic endoluminal tracheal occlusion in a fetus with severe congenital diaphragmatic hernia Ultrasound Obstet Gynecol. 2020, doi:10.1002/uog.20355 Yuksel, M.A. and Tayyar A,
- The assessment of cardiac function with tissue Doppler imaging in fetuses with congenital diaphragmatic hernia The Journal of Maternal-Fetal & Neonatal Medicine, 2020, 33:7, 1233-1238, DOI: 10.1080/14767058.2019.1674806 Kaya B, Tayyar A, Sezer S, Kaya S.
- Maternal serum mitofusin-2 levels in patients with preeclampsia: the possible role of mitochondrial dysfunction in preeclampsia The Journal of Maternal-Fetal & Neonatal Medicine, 2019 ,DOI: 10.1080/14767058.2018.1532497 Aydogan BM, Yuksel I, Tayyar A, Aslan Cetin B, Tayyar AT, Koroglu N.
- Wnt signaling pathway in early-and late-onset preeclampsia: evaluation with Dickkopf-1 and R-Spondin-3 glycoproteins Archives of gynecology and obstetrics. 2019 Jun 1;299(6):1551-6. Tayyar AT, Karakus R, Sahin ME, Topbas NF, Sahin E, Karakus S, Yalcin ET, Tayyar A.
- Comparison of fetal cardiac functions between small-for-gestational age fetuses and late-onset growth-restricted fetuses Journal of Perinatal Medicine, 2019, DOI: https://doi.org/10.1515/jpm-2019-0206 Kaya B, Tayyar A, Kanber Acar D, Kaya S.
- Assessment of fetal right ventricular myocardial performance index changes following intrauterine transfusion The Journal of Maternal-Fetal & Neonatal Medicine. 2019 Oct 12:1-4. Temel Yüksel İ, Acar D, Turhan U, Aslan ÇetIn B, Köroğlu N, Şenol G, Tayyar A, Yüksel MA.
- Perinatal outcomes of intrauterine transfusion for foetal anaemia due to red blood cell alloimmunisation Journal of Obstetrics and Gynaecology. 2019 Aug 26:1-5. Şavkli AÖ, Çetin BA, Acar Z, Özköse Z, Behram M, Çaypinar SS, Tayyar A, Yüksel MA.
- Maternal serum sestrin 2 levels in preeclampsia and their relationship with the severity of the disease Hypertens Pregnancy, 2018, 1-7. doi:10.1080/10641955.2018.1540702 Tayyar, A. T., Tayyar, A., Kozali, S., Karakus, R., Eser, A., Abide Yayla, C., Yalcın ET, Dag I, Eroglu, M.
- Increased maternal C1q/TNF-related protein-1 (CTRP-1) serum levels in pregnancies with preeclampsia The Journal of Maternal-Fetal Neonatal Medicine, 2018, Doi :10.1080/14767058.2018.1498838 Acar DK, Tayyar A, Yuksel A, Atis A, Ekiz A, Topcu G.
- Maternal cytoglobin (CYGB) serum levels in normal and preeclamptic pregnancies. The Journal of Maternal-Fetal Neonatal Medicine, 2018, Doi: 10.1080/14767058.2017.1421927 Tayyar AT, Tayyar A, Kozali S, Karakus R, Karakus S, Temel YI, Dag Ismail,Yetkin Yildirim Gonca,Demirci Oya
- Increased levels of the novel hepatokine fetuin B in patients with intrahepatic cholestasis of pregnancy. The Journal of Maternal-Fetal Neonatal Medicine 2017; 1-6., Doi: 10.1080/14767058.2017.1413546 Koroglu N, Tayyar A, Tola EN, Yetkin YG, Temel YI, Aslan Cetin B, Dag I, Acar DK.
- Could first- and second-trimester biochemical markers for Down Syndrome have a role in predicting intrahepatic cholestasis of pregnancy? Archives of Medical Science 2017; Doi: 10.5114/aoms.2017.69865 Tayyar AT, Tayyar A, Atakul T, Yayla CA, Kilicci C, Eser A, Karakus R, Herkiloglu D, Cundubey C R, Tayyar M.
- Evaluation of FGF-19 and Beta-Klotho as biomarkers in patients with intrahepatic cholestasis of pregnancy Archieves of Medical Science 2017; Doi: 10.5114/aoms.2017.72424 Tayyar AT, Tayyar A, Kozali S, Karakus R, Koroglu N, Temel Yuksel I, Yetkin Yildirim G, Dag I, Eroglu M
- Upper limb hemimelia in a twin pregnancy which was obtained by an ICSI and PGD in a woman with mosaic Turners Syndrome and the prognosis. Organogenesis 2017;13(4), 179-182., Doi: 10.1080/15476278.2017.1358842 Tayyar AT, Tayyar A, Eser A, Kilicci C, Yenidede I, Selcuk S.
- Maternal copeptin levels in intrahepatic cholestasis of pregnancy J Matern Fetal Neonatal Med. 2017 Jun; 14:1-5. doi: 10.1080/14767058.2017.1335708. Tayyar A, Temel Yuksel I, Koroglu N, Tayyar A.T, Davutoglu Alıcı E, Akkaya Fırat A, Aslan Cetin B.
- Mean arterial pressure at 12, 22, 32 and 36 weeks gestation in screening for preeclampsia Ultrasound Obstet Gynecol. 2016 May;47(5):573-9. Tayyar A, Krinitakis K, Wright A, Wright D, Nicolaides KH.
- Uterine artery pulsatility index in the three trimesters of pregnancy: effects of maternal characteristics and medical history. Ultrasound Obstet Gynecol. 2015 Jun;45(6):689-97. Tayyar A, Guerra L, Wright A, Wright D, Nicolaides KH.
- Competing risk model in screening for preeclampsia by mean arterial pressure and uterine artery pulsatility index at 30-33 weeks” gestation Fetal Diagn Ther. 2014;36(1):18-27. Tayyar A, Garcia-Tizon Larroca S, Poon LC, Wright D, Nicolaides KH.
- Competing risks model in screening for preeclampsia by biophysical and biochemical markers at 30-33 weeks” gestation. Fetal Diagn Ther. 2014;36(1):9-17. Garcia-Tizon Larroca S, Tayyar A, Poon LC, Wright D, Nicolaides KH.
