Journal of Andrology
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Published-Ahead-of-Print November 1, 2006, DOI:10.2164/jandrol.106.000729

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Trends in semen parameters in the northeast of Scotland

Sreebala Sripada *, Sofia Fonseca , Amanda Lee , Kirsten Harrild , Dimitrios Giannaris , Eileen Mathers , and Siladitya Bhattacharya

* To whom correspondence should be addressed. E-mail: ogy302{at}abdn.ac.uk.

Aim To investigate trends in semen parameters in a cohort of 4832 Scottish men attending the Aberdeen Fertility Centre over a period of 12 years. Methods Retrospective review of data on semen quality collected in a single laboratory. Subjects Men with a sperm count >20 million per ml, attending a regional fertility centre. Main Outcome Measures Sperm density, sperm motility, motile density, trends in sperm parameters over time. Results The mean and standard deviation (SD) age of all men (n=5204) in the study was 34 (6) years. The median (inter quartile range) for sperm density and motile density for the study population were 61 (40-91) million/ml and 99 (47-181) million. The mean (SD) sperm motility was 49 (19)%. Among 4832 men (with a sperm count >20 million per ml), data adjusted for age and period of abstinence showed a decreasing trend for sperm density over time, R2 = 0.45 (p=0.017). There was no such trend in sperm motility and motile density. Conclusion Scottish men attending a subfertility clinic have shown a decline in semen density over a 12-year period. However, this trend has to be interpreted with caution due to fluctuations in semen parameters, population bias and the retrospective nature of the analysis.


Key words: Fertility • Infertility • Semen • Semen Analysis • Sperm






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