1. Department of Gynecological Endocrinology and Reproductive Medicine University Clinic of Bonn Bonn 53127 Germany
2. Department of Dermatology, Venereology and Allergy, St. Joseph Hospital University Clinic of Bochum Bochum 44791 Germany
3. Clinic of Urology, Pediatric Urology and Andrology, Molecular Andrology Justus Liebig University of Giessen Giessen 35392 Germany
4. Department of Dermatology and Allergy, Andrology Unit University Clinic of Bonn Bonn 53127 Germany
5. TFP VivaNeo Sperm Bank GmbH Düsseldorf 440219 Germany
6. Medical Care Centre for Gynecological Endocrinology and Reproductive Medicine (MVZ für Frauenheilkunde und IvF‐Medizin Bonn GbR) Bonn 53175 Germany