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. 1996 May;65(5):1015-20.

Data from men in greater Seattle area reveals no downward trend in semen quality: further evidence that deterioration of semen quality is not geographically uniform

C A Paulsen  1 , N G Berman, C Wang
Affiliations
  • PMID: 8612827
Free article

Data from men in greater Seattle area reveals no downward trend in semen quality: further evidence that deterioration of semen quality is not geographically uniform

C A Paulsen et al. Fertil Steril. 1996 May.
Free article

Abstract

Objective: To determine whether there has been a decline in semen quality in a group of healthy men during the past 21 years.

Design: Retrospective analysis of the relationship between time and changes in semen parameters over 21 years using regression analysis.

Setting: A tertiary university center.

Patients: Five hundred ten healthy, normal men who donated multiple semen samples as participants in clinical studies between 1972 and 1993.

Main outcome measures: Sperm concentration, semen volume, total numbers of sperm per ejaculate, and percent spermatozoa with normal morphology.

Results: There was no decrease in sperm concentration, semen volume, total number of sperm per ejaculate, and percent normal sperm morphology in 510 healthy men studied between 1972 and 1993.

Conclusion: We conclude that in this population of healthy young men there has not been any decline in semen quality in the past 21 years.

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