Küçükaydın M, Altın MA, Okur H, Zorlu M, İçer M: Single stage hypospadias reconstruction. 6th International Congress of Pediatric Surgery, 29th August - 1st September 1989, İstanbul, Turkey.

Küçükaydın M, Okur H, Turan C, İçer M, Zorlu M: Swenson operation for neonatal Hirschsprung’s disease. Asian Association of Pediatric Surgeons, XI. Congress. March 9 -12, 1992, Tokyo, Japan

Okur H, Küçükaydın M, Köse K, Kontaş O, Doğan P, Kazez A: Hypoxia-induced necrotizing enterocolitis in the immature rat: the role of lipid peroxidation and management by vitamin E. Pediatric Week Holland. 29 June - 6 July  1994, Rotterdam, Holland.

Okur H, Küçükaydın M, Kır C, Turan C, Bekerecioğlu A, Kazez A, Bozkurt A: Majör böbrek yaralanmalı hastalarda erken ve geç cerrahi sonuçları. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Küçükaydın M, Kurtoğlu S, Okur H, Kazez A, Özokutan BH, Turan C, Bekerecioğlu A, Köse Ö: Surgical management of ambiguous genitalia in children. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Okur H, Küçükaydın M, Balkanlı S, Kazez A, Bozkurt A, Özokutan BH: Giant bronchogenic cyst presenting as a lobar emphysema in the newborn. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Küçükaydın M, Okur H, Kazez A, Bozkurt A, Kır C, Özokutan BH: Congenital absence of ribs with diaphragmatic hernia and herniated liver. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Küçükaydın M, Okur H, Turan C, Kazez A, Bozkurt A, Bekerecioğlu A: Hirschsprung’s disease and congenital mesenteric defect. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Turan C, Okur H, Bozkurt A, Özokutan BH, Kır C, Köse Ö, Küçükaydın M: Karın duvarı defektlerinde mortaliteyi artıran faktörler. XIV. Annual International Congress of Turkish Association of Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Turan C, Kazez A, Okur H, Bekerecioğlu A, Özkan U, Küçükaydın M: İki kardeşte duodenal atrezi ve anüler pankreas. XIV. Annual International Congress of Turkish Association of  Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Kazez A, Küçükaydın M, Turan C, Kır C, Bozkurt A, Okur H, Özkan U: Neonatal gastrointestinal perforasyon. XIV. Annual International Congress of Turkish Association of  Pediatric Surgeons. 26-30 September 1995, Pamukkale, Turkey

Okur H, Küçükaydın N, Kontaş O, Küçükaydın M, Özokutan BH: Esophageal anastomosis-an experimental model to study anastomotic healing and the use of lyophilized collagen. 1st World Conference on the Prevention and Treatment of Caustic Esophageal Bburns in Children. 3-5 April 1996, Çesme, İzmir, Turkey

Küçükaydın M, Özokutan BH, Kurtoğlu S, Okur H, Turan C, Bekerecioğlu A, Bozkurt A, Köse Ö: Surgical management of ambiguous genitalia in children. Intersex. An International Workshop 4-6 November 1996, İstanbul.

Okur H, Muhtaroğlu S, Bozkurt A, Kontaş O, Küçükaydın N, Küçükaydın M: The effects of flutamide on testicular histology, androgen production and fertility in rats. British Association of Paediatric Surgeons XLIV Annual International Congress 22-25th July  1997, İstanbul.

Küçükaydın M, Bekerecioğlu A, Küçükaydın N, Kula M, Kontaş O, Tutuş A, Okur H, Doğan P: İntestinal iskemi-reperfüzyon hasarınnın patogenezinde nitrik oksitin rolü. XV. Annual International Congress of Turkish Association of Pediatric Surgeons. 21-22 July, 1997, İstanbul.

Okur H, Özokutan BH, Kocaoğlu C, Köse Ö, Küçükaydın M: Management of reflux-induced esophageal strictures. Ege Pediatric Thorax Days III, The Pediatric Esophagus, April 20-22,1998, Kuşadası, Aydın

Okur H, Özokutan BH, Muhtaroğlu S, Küçükaydın M: The role of nitric oxide on the lipid peroxidation and antioxidant system in sepsis. British Association of Paediatric Surgeons, XLV Annual International Congress, 21-24 July 1998, Bristol, U.K.

Okur H, Gough D: Management of Müllerian duct remnants. Extrophy-Epispadias Complex Workshop-II. International Workshop. 19-20 November, 1998, İstanbul

Turan C, Özkan U, Özokutan BH, Özdemir M, Okur H, Küçükaydın M: The morbidity and mortality in neonates with corrosive esophageal injury. Ege Pediatric Thorax Days III, The Pediatric Esophagus, April 20-22,1998, Kuşadası, Aydın

Okur H, Özokutan BH, Kocaoğlu C, Köse Ö, Özkan U, Küçükaydın M: Evaluation of the Alvarado Score in the diagnosis of acute appendicitis: a prospective study.  British Association of Paediatric Surgeons, XLV Annual International Congress, 21-24 July 1998, Bristol, U.K.

Okur H, Küçükaydın M, Özokutan BH, Muhtaroğlu S, Kazez A, Turan C: Relationship between beta-endorphin and cortisol release and trauma severity in children. 3rd European Congress of Paediatric Surgery, May 6-8, 1999, Brussels, Belgium

Okur H, Özokutan BH, Turan C, Köse Ö, Özkan U, Kabaklıoğlu M, Küçükaydın M: Traumatic diaphragmatic ruptures in children. 3rd European Congress of Paediatric Surgery, May 6-8, 1999, Brussels, Belgium

Küçükaydın M, Turan C, Okur H, Özokutan BH, Köse Ö, Sağlam A: Laparoscopic and thoracoscopic surgery for hydatid cysts in children. British Association of Paediatric Surgeons. XLVI. Annual International Congress, 20-23  July, 1999, Liverpool, England

Okur H: Gevher Nesibe Hospital: one of the oldest hospitals of Anatolia, from XIIth century. The 8th Meeting of the International Society of the History of Paediatric Surgery. 18th July 2000, Sorrento, Italy

Küçükaydın M, Karaca F, Kurtoğlu S, Okur H, Turan C, Kabaklıoğlu M, Özdemir M: Çocuklarda ambiguous genitalianın cerrahi tedavisi. XIX. Annual Meeting of Turkish Association of Pediatric Surgeons with International Participation. 7-11 October 2001, Antalya, Turkey

Okur H, Kuyucu T, Kabaklıoğlu M, Özdemir M, Orhan B, Akçakuş M, Kurtoğlu S: Yenidoğanda uterus prolapsusu. XIX. Annual Meeting of Turkish Association of Pediatric Surgeons with International Participation. 7-11 October 2001, Antalya, Turkey

Okur H, Karaca F, Kabaklıoğlu M, Gözüküçük A, Alkan Y: Konjenital prepubik sinüs. XIX. Annual Meeting of Turkish Association of Pediatric Surgeons with International Participation. 7-11 October 2001, Antalya, Turkey

Okur H, Turan C, Arslan D, Gözüküçük A, Kabaklıoğlu M, Karaca F, Özdemir M, Alkan Y, Küçükaydın M: Çocuklarda peptik ülser perforasyonları. XIX. Annual Meeting of Turkish Association of Pediatric Surgeons with International Participation. 7-11 October 2001, Antalya, Turkey

Okur H, Kurtoğlu S, Çetin N, Özokutan BH: Penoscrotal transposition. Hypos’02 John W.Duckett Memorial Meeting and Workshop on Hypospadias. 7-9 April, 2002, İstanbul, Turkey.

Okur H, Köse Ö, Kula M, Öztürk F, Muhtaroğlu S, Sümerkan B: The role of infection and free oxygen radical damage in reflux nephropathy: an experimental study. European Society for Paediatric Urology, 13th Annual Meeting, 11-13 April 2002, Budapest, Hungary.

Okur H, Köse Ö. Kula M, Öztürk F, Muhtaroğlu S. Sümerkan B: The role of infection and free oxygen radical damage in reflux nephropathy: an experimental study. European Society for Paediatric Urology. 13th meeting. Hungary, 11-13 April, 2002.

Küçükaydın M, Karaca F, Gözüküçük A, Arslan D, Okur H, Orhan B, Alkan İY, Ayangil HR, Karakaya AE: Sugiura procedure for children with hemorrhagic portal hypertension secondary to extrahepatic portal vein occlusion. British Association of Paediatric Surgeons. The 50th Annual International Congress, 15th-18th July, 2003, Estoril, Portugal

Okur H, Karaca F, Gözüküçük A, Erdoğan N, Ayangil HR, Alkan Y, Turan C, Küçükaydın M: Acute scrotum in children. Workspop on undescended testis&International meeting on undescended testis and related disorders. April 16-18 2004, İstanbul, Turkey

Okur H, Muhtaroğlu S, Gözüküçük A, Kontaş O: Effects of unilateral spermatic vascular ligation on İnhibin B, gonadotropin, testosteroene secretion and fertility. British Association of Paediatric Surgeons. 51st Annual International Congress. 27th-30th July 2004, Oxford, UK

Gözüküçük A, Okur H, Kula M, Öztürk F, Muhtaroğlu S: The protective effect of vitamin E on kidney damage in vesicoureteral reflux: an experimental study. British Association of Paediatric Surgeons. 51st Annual International Congress. 27th-30th July 2004, Oxford, UK

Okur H, Doğru K, Ünver AC, Somak E: Basic Experimental Research Course According to Participant Evaluation. 40th. Congress of the Society for Surgical Research. May 20-28, 2005, Konya, Turkey

Okur H, Alkan Y, Karakaya AE, Güzel M: Microvascular orchidopexy. XVIII. Annual Meeting ofthe European Society for Paediatric Urology (ESPU), Brugge, April 25-28, 2007 (Video sunumu)

Şehiraltı V, Tosyalı AN, Mutuş HM, Ulukaya-Durakbaşa Ç, Özen MA, Okur H: Isolated renal hydatid cysts. 9th European Congress of Paediatric Surgery, June 18-21, 2008,  İstanbul, Turkey

Mutuş HM, Şehiraltı V, Ulukaya-Durakbaşa Ç, Tosyalı AN, Yörük A, Okur H: Wilms’ Tumor: 16 years’s experience. 9th European Congress of Paediatric Surgery, June 18-21,  2008, İstanbul, Turkey

Güven A, Ulukaya Durakbaşa Ç, Güçlüer  B, Okur H:  Testicular adrenal rest tumors in adolescent boys with classical adrenal hyperplasia: radiologic and histological investigation. Hormone Research. LWPES/ESPE 8th Joint Meeting Global Care in Pediatric Endocrinology, September 9-12, 2009, New York, A.B.D.

Timlioğlu S, Akın A, Yazıcı S, Süerdem S, Yörük A, Deregözü S, Yücel D, Palacı H, Elmas SG, Okur H: Hasta ve Çalışan Güvenliği Kapsamında beklenmedik olay bildirimleri. Uluslararası Sağlıkta Performans ve Kalite Kongresi. 19-21 Mart 2009, Antalya

Palacı H, Timlioğlu S, Temel SG, Deregozü S, Şahan Ö, Büyükgebiz F, Yücel D, Okur H: Kamu hastanelerinde hasta ve çalışan memnuniyeti ornek olay: Göztepe Eğitim ve Araştırma Hastanesi Halkla ilişkiler faaliyetleri. Uluslar arası Sağlıkta Performans ve Kalite Kongresi. 19-21 Mart 2009, Antalya

Yücel D, Palacı H, Timlioğlu S, Şahan Ö, Okur H: Hasta ve çalışan güvenliği kapsamında radyasyon güvenliği hizmet içi eğitim proegramının etkinliğine ilişkin bir örnek olay çalışması. Uluslar arası Sağlıkta Performans ve Kalite Kongresi. 19-21 Mart 2009, Antalya

Yücel D, Timlioğlu S, Palacı H, Gül Temel S,Dereğözü S, Büyükgebiz F, Okur H: Sağlıklı iletişim ve iletişim teknikleri eğitim programlarının hasta memnuniyeti üzerindeki etkileri. Uluslar arası Sağlıkta Performans ve Kalite Kongresi. 19-21 Mart 2009, Antalya

Timlioğlu S, Akın A, Yazıcı S, Süerdem S, Yörük A, Deregözü S, Yücel D, Palacı H, Elmas SG, Okur H:  Hasta ve çalışan güvenliği kapsamında beklenmedik olay bildirimleri. II. Uluslar arası Sağlıkta Performans ve Kalite Kongresi. Bildiriler Kitabı, Ankara 2010

 Okur H, Mutuş M, Ulukaya Durakbaşa Ç, Korkmaz M, Çağlar M, Baş A, Özen MA, Sert M, Anadolulu Aİ: Treatment of Bladder extrophy and epispadias: a single center’s experience. Exstrophy-Epispadias Complex Workshop III. June 11-12, 2010, İstanbul , Turkey

Ulukaya-Durakbaşa Ç., Çağlar M., Selma F., Baş A., Korkmaz M., Mutuş H.M., Kaymakçı A., Okur H., Okur H., "Colorectal Polyps: Clinical Experience", 8th International Colorectal Club Meeting,, TÜRKIYE, 10-12 Temmuz 2011, vol.1, no.1

Özen M.A., Ulukaya-Durakbaşa Ç., Zemheri I.E., Mutuş H.M., Okur H., Okur H., "Calcitonin-Gene Related Peptide (Cgrp) And The Human Cremasteric Muscle. ", 13th Congress of European Paediatric Surgeons’ Association (EUPSA) and 59th Congress of British Association of Paediatric Surgeons (BAPS), (13-16 June 2012), Roma, İtalya., ITALYA, 13-16 Temmuz 2012, vol.1

Mutuş H.M., Bayar A., Anadolulu A.İ., Ulukaya Durakbaşa Ç., Okur H., "Evaluation of Biofeedback Training Results.", 15th Congress of the European Pediatric Surgeons’ Association, Dublin, IRLANDA, 18-21 Haziran 2014, pp.258-258

Çağlar Oskaylı M., Özatman E., Mutuş M., Ulukaya Durakbaşa Ç., Gülçin N., Anadolulu A.İ., Okur H, et al.,"An Overview of a Frequently Performed Surgical Procedure: Lymph Node Biopsies.", 15th Congress of the European Pediatric Surgeons’ Association, Dublin, IRLANDA, 18-21 Haziran 2014, pp.3-3

Gülçin N., Fettahoğlu S., Aksu B., Ergüven M., Bayar A., Ulukaya Durakbaşa Ç., Okur H, et al.,"Acute Gangrenous Perforated Cholecystitis Secondary to Collagen Tissue Disorder", 15th Congress of the European Pediatric Surgeons’ Association, Dublin, IRLANDA, 18-21 Haziran 2014, pp.248-249

Fettahoğlu S. , Ulukaya Durakbaşa Ç., Çağlar M., Yörük A., Mutuş M., Bayar A., Okur H. "Nonovarian Pelvic Masses", EUPSA 15. EUROPEAN CONGRESS OF PEDİATRİC SURGERY, Dublin, IRLANDA, 18-21 Haziran 2014, pp.172-172

Gülçin N., Bayar A., Yörük A., Çağlar Oskaylı M., Ulukaya Durakbaşa Ç., Mutuş M. Okur H. "Clinical Approach to Liver Masses in Children", 15th European Congress of Paediatric Surgery, Dublin, IRLANDA, 18-21 Haziran 2014, pp.1-1

Çağlar Oskaylı M., Maşrabacı K., Mutuş M., Gülçin N., Anadolulu A.İ., Fettahoğlu S. Okur H."Surgical Approach to Ovarian Torsion", 15th Congress of the European Pediatric Surgeons’ Association, Dublin, IRLANDA, 18-21 Haziran 2014, pp.2-2