Ertürk Aksakal, S., Pay, R. E., Köse, C., Özkan, D., & Engin Üstün, Y. (2022). The Effect of Hydrotherapy Applied During the Active Phase of Labor on Postpartum Depression: A Case-Control Study. J Clin Obstet Gynecol, 32(4),120-126. DOI: 10.5336/jcog.2022-88397
Ozkan, D., Ibanoglu, M. C., Adar, K., Ozkan, M., Lutfi Tapisiz, O., Engin-Ustun, Y., & Iskender, C. T. (2023). Efficacy of blood parameters in predicting the severity of gestational hypertension and preeclampsia. Journal of Obstetrics and Gynaecology, 43(1),2144175. https://doi.org/10.1080/01443615.2022.2144175
Ozkan, D., Tokgoz Cakir, B., Polat Kamaci, C., Ozkan, M., Iskender, C., Tapisiz, O., & Engin-Üstün, Y. (2023). Is There a Predictable Cost-Benefit Ratio in Preeclampsia? Cureus, 15(6),e41051. https://doi.org/10.7759/cureus.41051
Reis, Y. A., Akay, A., Diktaş, E. G., Özkan, M., Öztürk, N., Özkan, D., Çakır, B. T., & Erkaya, S. (2023). Prediction of Rupture by Complete Blood Count in Tubal Ectopic Pregnancies Treated with a Single-Dose Methotrexate Protocol. Revista Brasileira de Ginecologia e Obstetricia, 45(9),e503–e510. https://doi.org/10.1055/s-0043-1772485
Aksan A, Akay A, Ayas Ozkan M, Ozkan HD, Erkaya S, Ustun Y. Assessment of the Risk Factors of Recurrence for Ectopic Pregnancy in Turkey; A Case-Control Study. Nep J Obstet Gynecol. 2024;19(1):43-48. https://doi.org/10.70241/njog86
Özkan, H. D., & Güney, H. D. (2025). Interactions between pregnant women's nutrition habits, psychological well-beings, sleep quality and biochemical parameters. International Journal of Gynaecology and Obstetrics, 168(3),1312–1320. https://doi.org/10.1002/ijgo.15992
Ozkan, H. D., Ozkan, M. A., Filiz, A. A., Karakaya, M. E., & Engin-Ustun, Y. (2025). The Effect of Ovarian Endometriosis on Pregnancy Outcomes in Spontaneous Pregnancies. Journal of Clinical Medicine, 14(10),3468. https://doi.org/10.3390/jcm14103468
Duygulu Bulan, D., Mutlu Sutcuoglu, B., Karabay, G., Seyhanli, Z., Vanli Tonyali, N., Ozkan, H. D., & Celen, S. (2025). C-reactive protein velocity and inflammatory burden index: new systemic inflammatory biomarkers and their predictive value for the latent period in preterm premature rupture of membrane pregnancies. Archives of Gynecology and Obstetrics, 312(3),979–988. https://doi.org/10.1007/s00404-025-08089-1
Neval Çayönü Kahraman, Gülşah Dağdeviren, Seda Biltekin, Halis Doğukan Özkan, Nazan Vanlı Tonyalı, Ali Turhan Çağlar. Evaluation of fetomaternal outcomes and serum analytes in placenta previa and associated placenta accreta spectrum. J Controv Obstetr Gynecol Ped. 2025;3(3):51-55. DOI: 10.51271/JCOGP-0049
Dayanan, R., Bulan, D. D., Ozkan, M. A., Ozkan, H. D., & Caglar, A. T. (2025). Fetal Pulmonary-Artery Doppler Dynamics in Preeclampsia. Journal of Ultrasound in Medicine, 44, 1903-1912. https://doi.org/10.1002/jum.70031
Özkan, H. D., Ayas Özkan, M., Yıldız, A. G., Çayönü Kahraman, N., & Engin-Üstün, Y. (2025). The impact of surgical intervention on time to conception and obstetric outcomes in women with endometriomas: a retrospective cohort study. BMC Pregnancy and Childbirth, 25(1),824. https://doi.org/10.1186/s12884-025-07988-0
Ozkan, H. D., Ayas Ozkan, M., Dayanan, R., Duygulu Bulan, D., Filiz, A. A., & Engin-Ustun, Y. (2025). Inflammatory status and clinical phenotypes of PCOS: the role of NLR, SII, SIRI, and AISI. BMC Women’s Health, 25(1),463. https://doi.org/10.1186/s12905-025-04033-2
Duygulu Bulan, D., Seyhanli, Z., Dayanan, R., Kurtulus Aydin F., Ozkan H. D., Akin F., & Caglar A. T. Clinical Significance of First Trimester Combined Inflammatory Markers in Predicting Adverse Obstetric Outcomes in Multiple Sclerosis. Bratislava Medical Journal. 2025. https://doi.org/10.1007/s44411-025-00395-z
Ayas Ozkan, M., Ozkan, H. D., Dayanan, R., Sarı, H., Akın, F., Dağdeviren, G., & Çağlar, A. T. (2026). Foramen Ovale Measurements and Venous Hemodynamic Changes Assessed by Inferior Vena Cava Doppler Parameters in Early- and Late-Onset Fetal Growth Restriction. Journal of Clinical Medicine, 15(3),980. https://doi.org/10.3390/jcm15030980
Hilal Korkmaz, Mustafa Akşar, Halis Doğukan Özkan, Vakkas Korkmaz, Nurettin Boran. Predictive Value of Complete Blood Count Inflammatory Parameters for Epithelial Ovarian Cancers in Women During Reproductive Period. Acta Oncol Tur. 2021;54(2):217-223. DOI: 10.5505/aot.2021.30922
Caner Çakır, Rıza Dur, Betül Tokgöz, Doğukan Özkan, Çağatayhan Öztürk, Fulya Kayıkçıoğlu, Vakkas Korkmaz. Adjuvan kemoterapi almış evre 1 yüksek dereceli seröz over kanseri olan 38 hastanın klinikopatolojik özellikleri. Kocatepe Medical Journal. 2022;23(3):335-338. https://doi.org/10.18229/kocatepetip.943572
Utkan Sağır, Çiğdem Kılıç, Halis Doğukan Özkan, Fatih Kılıç, Mehmet Ünsal, Okan Aytekin, Çiğdem Mesci, Günsu Kimyon Cömert, Taner Turan. Factors Predicting Inaccuracy Between Frozen Section Analysis and Postoperative Pathology Results: A Tertiary Center Experience. Hitit Medical Journal. 2022;4(3):89-97. https://doi.org/10.52827/hititmedj.1126502
Yıldız Akdaş Reis, Merve Özkan, Seval Yılmaz Ergani, Müjde Can İbanoğlu, Doğukan Özkan, Tuğba Kınay, Salim Erkaya. Latest trend ectopic pregnancy management in a tertiary health center: a retrospective cohort study. Perinatal Journal. 2022;30(3):308–313.
Ozkan, H. D., Gobel, P., & Guney, H. D. The relationship between health literacy and digital healthy diet literacy and dietary habits of pregnant women in different trimesters. Annals of Medical Research. 2025;32(9):408-414. DOI: 10.5455/annalsmedres.2025.07.184
Ayas Özkan, M., Özkan, H. D., Egemen Tolunay, H., Yucel, A. Cerebroplacental Ratio and Perinatal Outcomes in Preterm Premature Rupture of Membranes. South Clin Ist Euras. 2025;36(2):177-182. DOI: 10.14744/scie.2025.79989
Özkan HD, Doğan Güney H, Çetindağ EN. The relationship between body perception, self-esteem, depression and eating behaviors of pregnant women. Journal of Health Sciences and Medicine. 2025;8(4):581-587.
Ayas Özkan, M., Dayanan, R., Duygulu Bulan, D., Özkan, H. D., Aktemur, G., Karabay, G., Tokgöz Çakır, B., Şeyhanlı, Z., Atılgan Yıldırım, A., Akın, F., & Vural Yılmaz, Z. (2026). Association of Maternal Creatinine-to-Body Weight and Urea-to-Creatinine Ratios with Gestational Diabetes Mellitus. The European Research Journal, 12(3),329-338. https://doi.org/10.18621/eurj.1854589
Özkan Halis Doğukan, Üstün Yaprak. Obez Gebenin Yönetim Stratejileri ve Yoğun Bakımı. İçinde: Obstetrik ve Jinekolojik Aciller. Editör: Mungan Muhittin Tamer. Moderntıp Yayınevi, 2025. ISBN: 978-605-4477-63-0.
Özkan HD, Şahin Uysal N. Chronic Hypertension. In: Yücel A, editor. Understanding Maternal Diseases in Pregnancy: A Clinical Perspective. 1st ed. Ankara: Türkiye Klinikleri; 2026. p.15-30.