The majority of males with subnormal hypoosmotic test scores have normal vitality.

@article{Bollendorf2012TheMO,
  title={The majority of males with subnormal hypoosmotic test scores have normal vitality.},
  author={Aniela Bollendorf and Jerome H. Check and Dennis E. Kramer},
  journal={Clinical and experimental obstetrics & gynecology},
  year={2012},
  volume={39 1},
  pages={25-6}
}
PURPOSE To determine if males with low hypoosmotic swelling (HOS) test scores may have normal vitality tests. METHODS Retrospective nine-year review of initial semen analyses evaluating vitality and HOS tests. RESULTS Only 12.5% (45/361) of males with low HOS test scores have low vitality. CONCLUSIONS WHO seems to treat vitality and HOS as equal tests. We disagree and find that structural defects of the sperm membrane are much less common than functional impairment of the sperm membrane… CONTINUE READING