Sperm donation is the provision (or "donation") by a male (known as a sperm donor) of his sperm (known as donor sperm), principally for the purpose of inseminating a female who is not his sexual partner.
Sperm may be donated privately and directly to the intended recipient, or through a sperm bank or fertility clinic. Sperm donation is a form of third party reproduction. Pregnancies are usually achieved by using donor sperm in assisted reproductive technology (ART) techniques which include artificial insemination (either by intracervical insemination (ICI) or intrauterine insemination (IUI) in a clinic, or intravaginal insemination at home). Less commonly, donor sperm may be used in in vitro fertilization (IVF).
The method used can have consequences in relation to the legal recognition of the male parent (partner of the mother) in some countries, but the biological nature of the conception and the course of the pregnancy will be the same, however it is achieved, and the sperm donor will be the biological father of every child produced from his donations.
The primary recipients of donor sperm are single women, lesbian couples and heterosexual couples suffering from male infertility.
Donor sperm and 'fertility treatments' using donor sperm may be obtained at a sperm bank or fertility clinic. Here, the recipient may select donor sperm on the basis of the donor's characteristics, such as looks, personality, academic ability, race, and many other factors. Sperm banks or clinics may be subject to state or professional regulations, including restrictions on donor anonymity and the number of offspring that may be produced, and there may be other legal protections of the rights and responsibilities of both recipient and donor. Some sperm banks, either by choice or regulation, limit the amount of information available to potential recipients; a desire to obtain more information on donors is one reason why recipients may choose to use a known donor or private donation.