Removing the "relative" uncertainty within the Australian donor insemination network.

In Australia there is no federal legislation limiting the use of donor sperm. However, it is important to place limits on the multiple use of sperm donors to reduce the risk of inadvertent half-sibling mating between the offspring of anonymous donors and to control for the consequences of contact between identity-release donors and their donor-inseminated offspring. A nationally mandated donor registry should be established to enable, first, the calculation of updated variable values for use in the development and implementation of a predictive model to estimate the probability of half-siblings mating and provide policy-makers with empirical evidence to inform the setting of anonymous donor limits; and secondly, the linking of identity-release donors to their donor-inseminated offspring and an investigation into the psychosocial consequences of that linking so as to be able to implement suitable donor limits as well as management strategies and support systems for these new "extended families" within the donor insemination network.