--> --> In the absence of sperm, the sperm samples [are spun in a centrifuge to create a concentrated ‘pellet’ and examined further.
[AL1]What do you mean? If there is an absence of sperm, how can you refer to sperm samples?
After
In the absence of sperm, the sperm semen ] samples [AL2] are spun in a centrifuge to create a concentrated ‘pellet’ and examined further.
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