British Andrology Society guidelines for the screening of semen donors for donor insemination (1999).

The British Andrology Society (BAS) guidelines for the screening of semen donors have undergone a recent review, and following consultation with members of the Society and with experts in the allied professions, the following revised guidelines have been issued. Major changes include the introduction of an upper age limit for semen donors (<40 years old) and the general exclusion of men who are seropositive for cytomegalovirus as donors. The BAS recommends the screening of prospective semen donors for chromosomal abnormalities and for cystic fibrosis carrier status. Following the report of cross-contamination of human cells with hepatitis B virus within a liquid nitrogen storage vessel, the BAS recommends that steps be taken to ensure the safe cryopreservation of donor gametes.