of sperm via registered clinics for use in the UK has been authorised by the HFEA. The sperm must have been processed, stored and quarantined in compliance with UK regulations. The donors have agreed to be identified when the children produced with their sperm reach the age of eighteen. The number of children produced from such donors in the UK will, of course, be subject to HFEA rules (i.e. currently a limit of ten families,) but the donors' sperm may be used worldwide in accordance with the clinic's own limit, subject to national or local limits which apply. By 2014 the UK was importing nearly 40% of its sperm requirements, up from 10% in 2005. In 2018 it was reported that almost half of the imported sperm into Britain came from Denmark (3,000 units). Korea Korean Bioethics Law prohibits selling and buying of sperm between clinics, and each donor may only help giving rise to a child to one single couple. It suffers from a shortage. Canada Canada prohibits payment for gamete donation beyond the reimbursement of expenses. Many Canadians import purchased sperm from the United States. United States The United States, which permits monetary compensation for sperm donors, has had an increase in sperm donors during the late 2000s recession. Social controversy The use of sperm donation is most common among single women and lesbians. In particular, some sperm banks and fertility clinics, particularly in the US, Denmark and the UK, have a predominance of women being treated with donor sperm who come within these groups. This produces many ethical issues around the ideals of conventional parenting and has wider issues for society as a whole, including the issues of the role of men as parents, family support for children, and financial support for women with children. The growth of sperm banks and fertility clinics, the use of sperm agencies and the availability of anonymous donor sperm have served to make sperm donation a more respectable, and therefore a more socially acceptable, procedure. The intervention of doctors and others may be seen as making the whole process a respectable and merely a medical procedure which raises no moral issues, where donor inseminations may be referred to as 'treatments' and donor children as 'resulting from the use of a donor's sperm', or 'born following donation' and subsequent children may be described as 'born using the same donor' rather than as