Trends in Semen Quality and Testis Cancer in Finnish Men
Author Information
Author(s): Niels Jørgensen, Vierula M, Jacobsen R, Pukkala E, Perheentupa A, Virtanen H E, Skakkebæk N E, Toppari J
Primary Institution: University Department of Growth and Reproduction, Rigshospitalet, Copenhagen, Denmark
Hypothesis
The better reproductive health of Finnish men could be due to the fact that Finland ‘lagged behind’ in exposures to modern industrial pollution.
Conclusion
Recent birth cohorts of Finnish men show deteriorating semen quality and an increasing incidence of testis cancer.
Supporting Evidence
- Median sperm concentrations decreased from 67 million/mL in 1998-99 to 48 million/mL in 2006.
- Total sperm counts also decreased from 228 million in 1998-99 to 165 million in 2006.
- Percentage of morphologically normal spermatozoa dropped from 9.8% to 8.6% over the study period.
Takeaway
This study found that young Finnish men today have worse sperm quality and more testis cancer than older generations.
Methodology
The study involved a semen quality study and a registry study of testis cancer incidence among Finnish men from 1998 to 2006.
Potential Biases
Potential bias due to low participation rates and self-reported data.
Limitations
The study's participation rate was low, which may affect the generalizability of the findings.
Participant Demographics
Young Finnish men aged 10-59 years, primarily from the Turku area.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI 57–80
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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