In other projects Wikiquote. Sperm donation laws by country. Some controversy stems from the fact that donors father children for others but usually take no part in the upbringing of such children, and also from the fact that sperm banks often supply donor sperm or provide fertility services to single women and coupled lesbians, enabling them to have their own genetic child by a donor. Some states and local governments require additional screening. The sperm will be checked to ensure its fecundity and also to ensure that motile sperm will survive the freezing process. Sperm from a sperm donor may also be used in surrogacy arrangements and for creating embryos for embryo donation. The contract may also specify the place and hours for donation, a requirement to notify the sperm bank in the case of acquiring a sexual infection, and the requirement not to have intercourse or to masturbate for a period of usually 2—3 days before making a donation.
However, while some donors may be willing to offer this as a method of impregnation, it has many critics and it also raises further legal and social challenges.
The purpose of sperm donation is to provide pregnancies for women whose male partner is infertile or, more commonly, for women who do not have a male partner. By using different methods of fertilization using donor sperm, a sperm bank may increase the chances of a pregnancy. Please help improve this article by adding citations to reliable sources. Faced with a growing demand for donor sperm, sperm banks may try to maximise the use of a donor whilst still reducing the risk of consanguinity. In the media, there have been reports of some donors producing anywhere from over 40 offspring  to several hundred or more. Sperm samples from some men are more susceptible to damage during the freezing process than are others.