| sperm agglutination t. |
(for male factor infertility): any of various tests for presence of antisperm antibodies as a cause of infertility, based on the fact that large multivalent isotypes such as IgM or secretory IgA may be able to cross-link and agglutinate spermatozoa that have such antibodies. Serum or seminal plasma is mixed with a known concentration of sperm; immunoglobulins in the mixture then begin agglutinating the sperm. After a given period of time at 37°C, the amount of agglutination is assessed.
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