1. Centre for Artificial Insemination and Embryo Transfer; Vienna Austria
2. Department of Obstetrics and Gynecology; Faculty of Veterinary Medicine; University of Kafkas; Kars Turkey
3. Department of Obstetrics and Gynaecology; Faculty of Veterinary Medicine; University of Ondokuz Mayis; Samsun Turkey
4. Department of Obstetrics and Gynaecology; Faculty of Veterinary Medicine; University of Ankara; Ankara Turkey