We search for a donor sperm who is 35 years old maximum, similar to your partner (or to you, if you do the treatment alone), and a compatible blood type. The donor will be studied psychologically, medically and also genetically. We test the donor and you for the 3.200 most important recessive genetic diseases, to ensure you are compatible. The donor is 100% anonymous and has no rights or duties to the offspring obtained with his sperm.