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Cross-matching or crossmatching is a test performed before a blood transfusion as part of blood compatibility testing. Normally, this involves adding the recipient's blood plasma to a sample of the donor's red blood cells. If the blood is incompatible, the antibodies in the recipient's plasma will bind to antigens on the donor red blood cells.
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A 'directed' donation is when a person, often a family member, donates blood for transfusion to a specific individual. [3] Directed donations are relatively rare when an established supply exists. [4] A 'replacement donor' donation is a hybrid of the two and is common in developing countries. [5]
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Most countries have laws to cover sperm donations which, for example, place limits on how many children a sperm donor may give rise to, or which limit or prohibit the use of donor semen after the donor has died, or payment to sperm donors. Other laws may restrict use of donor sperm for in vitro fertilisation (IVF) treatment, which may itself be ...
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