1. Clinic for Obstetrics, Gynaecology and Andrology of Small and Large Animals, Justus-Liebig University of Giessen, 35392 Giessen, Germany
2. Institute for Animal Breeding and Domestic Animal Genetics, Justus-Liebig University of Giessen, 35398 Giessen, Germany
3. Institute of Veterinary Anatomy, Histology and Embryology, Justus Liebig University of Giessen, 35392 Giessen, Germany