Sperm washing is a term used to describe the process in which individual sperms are separated from the seminal fluid. The sperms are then used in intrauterine insemination or in vitro fertilization.
Sperm washing is a standard procedure used in infertility treatment.
Sperm may be "washed" by density gradient centrifugation or by a "direct swim-up" technique that doesn't involve centrifugation. In normal semen samples, centrifugation causes no more DNA damage to spermatozoa than a direct swim-up technique
Sperm Washing: How It Works
The sperm washing procedure involves spinning a semen sample in a centrifuge to separate it into three parts. Those parts can then be tested for HIV. Some researchers believe that the virus is carried in seminal fluids outside the sperm cells. The technique, therefore, might be used to isolate HIV from sperm cells, which can then be used to impregnate a woman via artificial insemination. But, doctors warn, no method is foolproof.
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