1. Laboratory of Theriogenology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
2. Laboratory of Reproductive Physiology, Graduate School of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
3. Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
4. United Graduate School of Veterinary Science, Gifu University, Gifu 501-1193, Japan
5. Division of Livestock and Forage Research, Beef Cattle Production Group, Tohoku Agricultural Research Center, NARO, Iwate 020-0198, Japan
6. Laboratory of Reproductive Physiology, Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
7. Obihiro University of Agriculture and Veterinary Medicine, Hokkaido 080-8555, Japan