Kaewlamun, W.; Suwimonteerabutr, J.; Chaimee, T.; Virakul, P.; Techakumphu, M. Low Pregnancy Rate in Dairy Cattle After Fixed Time Artificial Insemination Using Norgestomet + PGF2α + ECG Program During the Hot and Humid Months in Thailand. TJVM 2015, 38, 53-58.