Author's Organization: Department of Veterinary Obstetrics and Gynecology, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Obstetrics and Gynecology, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Obstetrics and Gynecology, Obihiro University of Agriculture and Veterinary Medicine
Published: August 15, 1991Received: December 25, 1990Available on J-STAGE: February 15, 2008Accepted: April 24, 1991
Advance online publication: -
Revised: -