1. Department of Anatomy and Cell Biology; Justus-Liebig-University; Giessen Germany
2. Institute for Clinical Immunology and Transfusion Medicine; Justus-Liebig-University; Giessen Germany
3. Clinic for Obstetrics; Gynecology and Andrology of Large and Small Animals; Faculty of Veterinary Medicine; Justus-Liebig-University; Giessen Germany
4. Department of Obstetrics and Gynaecology; Faculty of Medicine; Justus-Liebig-University; Giessen Germany
5. MRC Centre for Reproductive Health; University of Edinburgh; Edinburgh UK