After a vasectomy, its effectiveness should be checked. When should this be done? It is best to perform such a semen analysis after a vasectomy in the 8th and 12th week. We are often asked: why at 8 weeks and not, for example, at 3 weeks? This is because organogenesis, i.e. the formation of sperm until final maturation, takes 8 weeks. If the first semen analysis shows no sperm, we do not recommend performing a second test at 12 weeks. The patient scans and sends the result to the email address: badania@wazektomia.com and usually receives a reply within 3-4 working days with greetings and best wishes from the doctor.