o  Change in Milk Yield in Cows Inseminated after Observed Estrus or at a Fixed Time after Ovulation Synchronization. 133rd Conference of Japanese Society of Veterinary Science. March 2002, Tokyo (Japan).

o  Luteal Function and Conception in Lactating Cows after Artificial Insemination and Some Factors Affecting Luteal Function. 95th Conference of Japanese Society of Animal Reproduction, September 2002, Morioka (Japan).

o  Luteal Function and Conception in Lactating Cows and Some Factors Affecting Luteal Function after First Insemination. 36th Annual Convention of American Association of Bovine Practitioners, September 2003, Columbus, Ohio (USA).