Kaewlamun, W., Suwimonteerabutr, J., Chaimee, T., Virakul, P. and Techakumphu, M. 2015. Low Pregnancy Rate in Dairy Cattle after Fixed time Artificial Insemination using Norgestomet + PGF2α + eCG Program During the Hot and Humid Months in Thailand. The Thai Journal of Veterinary Medicine. 38, 2 (Jul. 2015), 53–58.