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Research Publication and Presentation 1. A. Roongsitthichai, S. Koonjaenak, P.

Tummaruk. Association among Serum Insulin-like Growth Factor-I, Backfat Thickness, and Age at First Observed Estrus in Gilts. 2013. Thai Journal of Veterinary Medicine. 43(1): 41-48

2. A. Roongsitthichai, S. Koonjaenak, P. Tummaruk. 2011. Association between Backfat Depth and Litter Size at Birth in Primiparous Sows. Kasetsart Journal (Natural Science). 45(3): 422-427

3. A. Roongsitthichai, J. Suwimonteerabutr, K. Kaeoket, S. Koonjaenak, P. Tummaruk. Association between Serum Cortisol and Progesterone Concentrations and the Infiltration of Immune Cells in the Endometrium of Gilts with Vaginal Discharge. 2010. Comparative Clinical Pathology. 20(6): 1-9

4. A. Roongsitthichai, S. Koonjaenak, P. Tummaruk. 2010. Backfat Thickness at First Insemination Affects Litter Size at Birth of the First Parity Sows. Kasetsart Journal (Natural Science). 44(6): 1128-1136

5. C. Tretipskul, K. Buranaamnuay, S. Koonjaenak, P. Tummaruk, M. Techakumphul. 2010. The Use of Computer-Assisted Sperm Analysis for Discriminating Series of Motility Pattern of Frozen-thawed Boar Semen. Thai Journal of Veterinary Medicine. 40(1): 25-30

6. A. Roongsitthichai, J. Suwimonteerabutr, S. Koonjaenak, P. Tummaruk. 2009. Effect of Serum Cortisol and Progesterone on the Infiltration of Leukocyte Subpopulations in the Gilt Endometrium. Thai Journal of Veterinary Medicine. 39(4): 409-410

7. S. Koonjaenak, V. Chanatinart, S. Aiumlamai, T. Pinyophumin, H. Rodriguez-Martinez. 2007. Seasonal variation in semen quality of swamp buffalo bulls (Bubalus bubalis) in Thailand. ASIAN JOURNAL OF ANDROLOGY. 9(1): 92-101

8. S. Koonjaenak, V. Chanatinart, H. Ekwall, H. Rodriguez-Martinez. 2007. Morphological features of spermatozoa of swamp buffalo ai bulls, in Thailand. JOURNAL OF VETERINARY MEDICINE SERIES A-PHYSIOLOGY PATHOLOGY CLINICAL MEDICINE. 54(4): 169-178

9. S. Koonjaenak, P. Pongpeng, S. Wirowuthikul, A. Johannisson, A. Kunavongkrit, Rodriguez-Martinez. 2007. Seasonality affects post-thaw plasma membrane intactness and sperm velocities in spermatozoa from

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Thai AI swamp buffaloes (Bubalus bubalis). THERIOGENOLOGY. 67(9): 1424-1435

10. S. Koonjaenak, A. Johannisson, P. Pongpeng, S. Wirowuthikul, A. Kunavongkrit, Rodriguez-Martinez. 2007. Seasonal variation in nuclear DNA integrity of frozen-thawed spermatozoa from Thai AI swamp buffaloes (Bubalus bubalis). JOURNAL OF VETERINARY MEDICINE SERIES A-PHYSIOLOGY PATHOLOGY CLINICAL MEDICINE. 54(7): 377-383