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Regional differences in semen quality in Europe
N Jørgensen1, A G Andersen, F Eustache
1Department of Growth and Reproduction, Rigshospitalet, The Juliane Marie Centre, Copenhagen, Denmark. njcph@rh.dk
Human Reproduction (Oxford, England)
|May 2, 2001
Summary
Semen quality varies across European cities, with Finnish men showing the highest sperm counts and Danish men the lowest. Seasonal variations also impact sperm concentration and total count, with summer levels lower than winter.
Area of Science:
- Reproductive Medicine
- Environmental Health
- Andrology
Background:
- Recent reports suggest declining semen quality in men across various countries.
- Potential regional differences in male reproductive health indicators warrant investigation.
Purpose of the Study:
- To investigate geographical variations in semen quality among fertile men in four European cities.
- To assess the impact of seasonality on semen parameters.
- To establish a reference point for future European semen quality studies.
Main Methods:
- Standardized semen analysis of 1082 fertile men from Copenhagen, Paris, Edinburgh, and Turku.
- Centralized morphology assessment and evaluation of inter-laboratory differences for sperm concentration.
- Estimation of semen quality for a standardized 30-year-old fertile male with 96-hour abstinence.
Main Results:
- Significant regional differences in sperm concentration and total sperm count were observed.
- Finnish men exhibited the highest sperm counts, while Danish men had the lowest.
- Seasonal variation showed lower sperm concentration and total count in summer compared to winter.
Conclusions:
- Geographical variations in semen quality exist across Europe, potentially linked to environmental or lifestyle factors.
- Seasonality significantly affects semen parameters, with reduced quality during summer months.
- The study provides crucial reference data for monitoring European male reproductive health trends.