In the UK, there are two options when it comes to testing for paternity: The donor screening process and the non-donor screening process. In donor screening process, a semen sample is collected from a man during a visit to the Sperm Bank located at the University of Manchester. After the semen sample is collected, it is sent to the research centre for analysis. The analysis of the semen sample will help the scientists to confirm whether the man is the father of the child or not. However, if the man denies all knowledge of the sperms, then this will be excluded as there was no direct communication between the couple during the time of their relationship..