A delayed sperm penetration of cumulus layers by disruption of acrosin gene in rats
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doi: 10.1002/MED.20159 248 LiWYueH
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9,63 An observational study that included 656 male partners of infertile couples found those who reported regularly wearing boxer-style underwear had 25% higher sperm concentrations, 17% higher sperm counts, and 14% lower FSH levels compared with men who regularly wore tighter styles of underwear