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Decline in sperm counts: an artefact of changed reference range of "normal"?
OBJECTIVE--To investigate a reported fall in sperm counts during 1940-90 in relation to the reduced lower reference value of "normal" during the same period by assuming the null hypothesis that no change had occurred in the probability distribution of the sperm concentration. DESIGN--Analy...
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| Main Authors: | , , , |
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| 格式: | Artigo |
| 語言: | Inglês |
| 出版: |
BMJ Group
1994
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| 主題: | |
| 在線閱讀: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2542636/ https://ncbi.nlm.nih.gov/pubmed/8044061 |
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