Sperm donation is the 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 donation is a form of third party reproduction including sperm donation, oocyte donation, embryo donation, surrogacy, or adoption. Number of births per donor sample will depend on the actual ART method used, the age and medical condition of the female bearing the child, and the quality of the embryos produced by fertilization. Donor sperm is more commonly used for artificial insemination (IUI or ICI) than for IVF treatments. This is because IVF treatments are usually required only when there is a problem with the female conceiving, or where there is a “male factor problem” involving the female's partner. Donor sperm is also used for IVF in surrogacy arrangements where an embryo may be created in an IVF procedure using donor sperm and this is then implanted in a surrogate. In a case where IVF treatments are employed using donor sperm, surplus embryos may be donated to other women or couples and used in embryo transfer procedures. 

On the other hand, insemination may also be achieved by a donor having sexual intercourse with a female for the sole purpose of initiating conception. This method is known as natural insemination.

The donation
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, e.g. 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 and/or private donation.

A sperm donor will usually donate sperm to a sperm bank under a contract, which typically specifies the period during which the donor will be required to produce sperm, which generally ranges from 6–24 months depending on the number of pregnancies which the sperm bank intends to produce from the donor. Donors may or may not be paid for their samples, according to local laws and agreed arrangements. Even in unpaid arrangements, expenses are often reimbursed. Depending on local law and on private arrangements, men may donate anonymously or agree to provide identifying information to their offspring in the future. Private donations facilitated by an agency often use a "directed" donor, when a male directs that his sperm is to be used by a specific person. Non-anonymous donors are also called known donors, open donors or identity disclosure donors.

Donor selection
A sperm donate must generally meet specific requirements regarding age (most often up to 40) and medical history. Potential donors are typically screened for genetic diseases, chromosomal abnormalities and sexually transmitted infections that may be transmitted through sperm. The donor's sperm must also withstand the freezing and thawing process necessary to store and quarantine the sperm. Samples are stored for at least 6 months after which the donor will be re-tested for sexually transmitted infections. This is to ensure no new infections have been acquired or have developed during the period of donation. If the result is negative, the sperm samples can be released from quarantine and used in treatments.

Screening includes:

  • Taking a medical history of the donor, his children, siblings, parents, and grandparents etc. for three to four generations back. This is often done in conjunction with the patient’s family doctor.
  • HIV risk assessment interview, asking about sexual activity and any past drug use.
  • Blood tests and urine tests for infectious diseases, such as: HIV-1/2, HTLV-1/2, Hepatitis B and C, Syphilis, Gonorrhea, Chlamydia, Cytomegalovirus (CMV), not all clinics test for this.
  • Blood and urine tests for blood typing and general health indicators: ABO/Rh typing, CBC, liver panel and urinalysis
  • Complete physical examination including careful examination of the penis, scrotum and testicles.
  • Genetic testing for carrier traits, for example: Cystic Fibrosis, Sickle-cell disease, Thalassemia, other hemoglobin-related blood disorders.
  • General health
  • Semen analysis for: sperm count, morphology, motility, acrosome activity may also be tested

Preparing the samples
A sperm donor is usually advised not to ejaculate for two to three days before providing the sample, to increase sperm count and to maximize the conception rate. A sperm donor produces and collects sperm by masturbation or during sexual intercourse with the use of a collection condom.

Sperm banks and clinics usually "wash" the sperm sample to extract sperm from the rest of the material in the semen. A cryoprotectant semen extender is added if the sperm is to be placed in frozen storage in liquid nitrogen, and the sample is then frozen in a number of vials or straws. One sample will be divided into 1-20 vials or straws depending on the quantity of the ejaculate and whether the sample is washed or unwashed. Following the necessary quarantine period, the samples are thawed and used to inseminate women through artificial insemination or other ART treatments. Unwashed samples are used for ICI treatments, and washed samples are used in IUI and IVF procedures.

Anonymity
Anonymous sperm donation occurs where the child and/or receiving couple will never learn the identity of the donor, and non-anonymous when they will. Non-anonymous sperm donors are, to a substantially higher degree, driven by altruistic motives for their donations.

Even with anonymous donation, some information about the donor may be released to the female/couple at the time of treatment. Limited donor information includes height, weight, eye, skin and hair color. In Sweden, this is all the information a receiver gets. In the US, on the other hand, additional information may be given, such as a comprehensive biography and sound/video samples.

Information made available by a sperm bank will usually include the race, height, weight, blood group, health, and eye color of the donor. Sometimes information about his age, family history and educational achievements will also be given.

Different factors motivate individuals to seek sperm from outside their home state. For example, some jurisdictions do not allow unmarried women to receive donor sperm. Jurisdictional regulatory choices as well as cultural factors that discourage sperm donation have also led to international fertility tourism and sperm markets.

Legal aspects
A sperm donor is generally not intended to be the legal or de jure father of a child produced from his sperm. Depending on the jurisdiction and its laws, he may or may not later be eligible to seek parental rights or be held responsible for parental obligations. Generally, a male who provides sperm as a sperm donor gives up all legal and other rights over the biological children produced from his sperm. However, in private arrangements, some degree of co-parenting may be agreed, although the enforceability of those agreements varies by jurisdiction.

Laws prohibits sperm donation in several countries: Algeria, Bahrain, Costa Rica, Egypt, Hong Kong, Jordan, Lebanon, Lithuania, Libya, Maldives, Oman, Pakistan, Philippines, Qatar, Saudi Arabia, Syria, Tajikistan, Tunisia, Turkey, UnitedArab Emirates, and Yemen. 

Donated sperm is recommended for:

  • Infertile male in a couple,
  • Men after surgical removal of the testes, chemotherapy or radiotherapy,
  • The partner who is carrier of a genetic disorder,
  • Surrogacy arrangement and for creating embryo for embryo donation.

Sperm donation is used for an artificial insemination in IUI or ICI or, less commonly, it may be used in other assisted reproductive techniques such as IVF and ICSI. The primary recipients are heterosexual couples suffering from male infertility, but also lesbian couples or single women. 

There are no health risks for a donor. Man may donate for a longer period than two years if a sperm bank has access to world markets to reduce the risk of consanguinity (but local lays vary widely).

There are no health risks for a donor. Man may donate for a longer period than two years if a sperm bank has access to world markets to reduce the risk of consanguinity (but local lays vary widely). The number of children permitted from a single donor varies by law and practice. These laws are designed to protect the children produced by sperm donation from consanguinity and further accidental incest in later life: they are not intended to protect the donor himself and those donating sperm will be aware that their donations may give rise to numerous pregnancies in different jurisdictions. Such laws, where they exist, vary from state to state, and a sperm bank may also impose its own limits. 

Laws regulating sperm donation also address issues such as permissible reimbursement or payment, rights and responsibilities of the donor towards his biological offspring, the child's right to know his/her father's identity, and procedural issues. In general, laws are more likely to disregard the sperm donor's biological link to the child, so that he will neither have child support obligations nor rights to the child, when sperm donation happens in a clinical setting and/or under medical supervision. Absent specific legal protection, courts may order the sperm donor to pay child support or recognize his parental rights. Even when donors choose to be anonymous, offspring may still find ways to learn more about their biological origins. Registries and DNA-databases have been developed for this purpose. Registries that help donor-conceived offspring identify half-siblings from other mothers also help avoid accidental incest in adulthood.

Despite laws limiting the number of offspring, some donors may produce substantial numbers of children, particularly where they donate through different clinics, where sperm is onsold or is exported to different jurisdictions, and where countries or states do not have a central register of donors.

The growth of sperm banks and fertility clinics, the use of sperm agencies and the availability of anonymous donor sperm have served to make the use of 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 biological children of the same male.

As regards health of sperm donor conceived children, they have a birth defect rate of almost a fifth compared to the general population. Also it has been shown that donor conceived people don’t have more adolescence problems than children of divorce.

In some cases female wishes to conceive additional children by sperm donation and she will often wish to use the same donor to have full biological siblings, who have the same biological parents. Many sperm banks offer a service of storing sperm for future pregnancies, but few will otherwise guarantee that sperm from the original donor will be available. Sperm banks rarely impose limits on the numbers of second or subsequent siblings. Even where there are limits on the use of sperm by a particular donor to a defined number of families (for example the UK) the actual number of children produced from each donor will often be far greater.

If donor conceived people want to find genetic half-siblings from the same gamete donation or sperm donor, there are donor registrations which facilitate it. Even when the donor is anonymous, he has the donor number at the fertility clinic where he donated. Thanks to these donor numbers they are able to find each other.

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Sources

Sperm donation ―sourced from Wikipedia licensed under CC BY-SA 3.0
Sperm bank ―sourced from Wikipedia licensed under CC BY-SA 3.0
Donor conceived people ―sourced from Wikipedia licensed under CC BY-SA 3.0
Accidental incest ―sourced from Wikipedia licensed under CC BY-SA 3.0
The morality of sperm donation ―by Gwern Branwen licensed under CC0 1.0
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