The percentage of sperm DNA damage in samples from sperm bank donors was not significantly different (P=.17), whereas the percentage of motile cells was lower (P=.009) after long-term (9-13 years) compared with short-term (1-5 years) storage. Density gradient isolation reduced the difference in sperm motility between the two groups.
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http://dx.doi.org/10.1016/j.fertnstert.2007.07.1343 | DOI Listing |
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