As acceptance of sperm donation has generally increased, so has the level of questioning as to whether 'artificial' means of conception are necessary, and some donor children too, have been critical of the procedures which were taken to bring them into the world.
Some donor children grow up wishing to find out who their fathers were, but others may be wary of embarking on such a search since they fear they may find scores of half-siblings who have been produced from the same sperm donor.