It has been suggested that the implementation of the Human Fertilisati
on and Embryology Act in the UK in 1991 may have had a detrimental eff
ect on the supply of semen donors. The aim of this survey was to obtai
n data relating to semen donation in the UK during 1989-1992. A questi
onnaire designed to obtain information about the recruitment and scree
ning of semen donors, the supply of semen donors, and use of donated s
emen for infertility treatment was sent to all licensed centres in Apr
il 1993 and 93% were returned for analysis. The results demonstrate th
at while the number of centres recruiting donors and the number of men
offering to be donors have increased in recent years, this has not re
sulted in an increased supply of donors. Reasons for these findings ar
e discussed in the light of the Human Fertilisation and Embryology Aut
hority regulations relating to semen donation.