Affiliation: | 1)Laboratory of Reproductive Physiology, Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan;2)Laboratory of Reproductive Physiology, Faculty of Agriculture, Okayama University, Okayama 700-8530, Japan;3)Japan Society for the Promotion of Science, Tokyo, Japan;4)Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan |