Objectives: To determine semen quality and reproductive hormone levels in young Faroese men.
Design: Descriptive cross-sectional study of Faroese men compared with Danish men.
Setting: Faroese one-centre study.
Participants: 481 men born from 1981 to 1987 and investigated from 2007 to 2010.
Outcome Measures: Sperm concentration, semen volume, total sperm count, sperm motility, sperm morphology and reproductive hormone levels.
Results: Sperm concentrations for the Faroese men were lower than for the Danish men (crude median 40 vs 48 mill/ml, p<0.0005). Semen volume was higher, and thus the total sperm counts did not differ (159 vs 151 mill, p=0.2). Motility and morphology did not differ between the Faroese and Danes. The inhibin B/follicle-stimulating hormone ratios for the Faroese men were lower than for the Danes (64 vs 76, p=0.001). Similarly, lower total testosterone/luteinising hormone (LH) ratio (4.6 vs 6.0, p<0.0005) and lower calculated free-testosterone/LH ratio (94 vs 134, p<0.0005) were detected for the Faroese men.
Conclusions: Semen quality among the Faroese men is at the same low level as reported for Danish men, and the reproductive hormone levels furthermore indicated a lower Leydig cell capacity for testosterone production. The influence of environmental exposure and genetic factors on semen quality has to be studied further.
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| http://dx.doi.org/10.1136/bmjopen-2012-001946 | DOI Listing |
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