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Geographic differences in semen quality of fertile U.S. males.
Although geographic variation in semen quality has been reported, this is the first study in the United States to compare semen quality among study centers using standardized methods and strict quality control. We evaluated semen specimens from partners of 512 pregnant women recruited through prenat...
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| Main Authors: | , , , , , , , , |
|---|---|
| 格式: | Artigo |
| 語言: | Inglês |
| 出版: |
2003
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| 主題: | |
| 在線閱讀: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1241421/ https://ncbi.nlm.nih.gov/pubmed/12676592 |
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