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Are sperm counts really falling?
Reproduction, Fertility and Development, 1998Semen quality is said to have been declining over the past 50 years. The biological significance of these changes is emphasized by a concomitant increase in the incidence of genitourinary abnormalities such as testicular cancer and cryptorchidism. The increase in regional frequency of testicular abnormalities over a relatively short period of time may
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Experience with Sperm Counts Following Vasectomy
British Journal of Urology, 1991Summary The records of Aberdeen men requesting vasectomy between 1978 and 1981 were studied and a sample of men were interviewed about 3 years after the operation; 85% completed the standard requirements for seminal analysis and were given the “all clear”; two‐thirds were cleared after sending 2 samples and usually within 20 weeks after vasectomy; 10 ...
Ian MacGillivray +3 more
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Low Sperm Counts May Be Preventable
Science, 2011In the News & Analysis article “Danish sperm counts spark data dispute” (G. Vogel, 17 June, p. [1369][1]), the Danish National Board of Health implies that it is normal for many young Danes to have a sperm count low enough to impair fertility. I disagree. Two recent U.S.
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Secular Trend in Reported Sperm Counts
Andrologia, 2009Claims that there has been a recent secular decline in splerm counts have been disputed. Protaglonists on both sides of the discussion have based their arguments on data from a few large samples at different times and (mostly) in different places. It is not disputed that the differences between the mean counts in the various samples are statistically ...
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Sperm counts, testicular cancers, and the environment
BMJ, 2017The PI3K pathway plays an important role in regulating cancer cell proliferation, growth, survival and metabolism. The serine/threonine kinase Akt, a central node of the PI3K pathway, is frequently activated in a significant proportion of human solid tumors, making Akt an attractive target for therapeutic intervention.
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Decline in sperm count in European men during the past 50 years
Human and Experimental Toxicology, 2018P. Sengupta +3 more
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Sperm Count and Hypogonadism as Markers of General Male Health.
European Urology Focus, 2019A. Ferlin +12 more
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