Journal ArticleDOI
Geographic variations in sperm counts: a potential cause of bias in studies of semen quality.
Harry Fisch,Erik T. Goluboff +1 more
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TLDR
Reanalysis of published data from a meta-analysis of 61 studies from 1938 to 1990 that concluded a worldwide decline in semen quality over the last 50 years to determine whether geographic variations in sperm counts might bias conclusions drawn from studies of semen quality.About:
This article is published in Fertility and Sterility.The article was published on 1996-05-01. It has received 176 citations till now. The article focuses on the topics: Semen quality.read more
Citations
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The question of declining sperm density revisited: an analysis of 101 studies published 1934-1996.
TL;DR: The average decline in sperm count was virtually unchanged from that reported previously by Carlsen et al. and that the observed trends previously reported for 1938-1990 are also seen in data from 1934-1996.
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Trends of male factor infertility, an important cause of infertility: A review of literature.
Naina Kumar,Amit Kant Singh +1 more
TL;DR: The present literature will help in knowing the trends of male factor infertility in developing nations like India and to find out in future, various factors that may be responsible for male infertility.
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Have sperm densities declined? A reanalysis of global trend data.
TL;DR: Detailed reanalysis of data from 61 studies supports a significant decline in sperm density in the United States and Europe and identifies the cause(s) of regional and temporal differences, whether environmental or other.
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Endocrine disruptors and human health--is there a problem? An update.
TL;DR: Results from studies on organochlorine contaminants show that levels were not significantly different in breast cancer patients versus controls, and many of the male and female reproductive tract problems linked to the endocrine-disruptor hypothesis have not increased and are not correlated with synthetic industrial contaminants.
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Male infertility and environmental exposure to lead and cadmium
TL;DR: Reverse transcriptase-polymerase chain reaction assays for Ca2+ and K+ channel isoforms may identify susceptibility subgroups with lower resistance to environmental exposures, explaining in part prospective blinded studies showing high Cd2+ in varicocele-related human infertility and high Pb2- in unexplained infertility.
References
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Journal ArticleDOI
Evidence for decreasing quality of semen during past 50 years.
TL;DR: There has been a genuine decline in semen quality over the past 50 years, and as male fertility is to some extent correlated with sperm count the results may reflect an overall reduction in male fertility.
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Male Fertility Potential in Terms of Semen Quality: A Review of the Past a Study of the Present
TL;DR: Although no change was noted in semen quality standards, the authors concur with earlier suggestions that the minimal standards recommended by the American Fertility Society be modified.
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Have sperm counts been reduced 50 percent in 50 years? A statistical model revisited
TL;DR: To reanalyze data that were used in a linear model to predict that mean sperm counts have been reduced globally by approximately 50% in the last 50 years, several different statistical models were reanalyzed.
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Decreasing quality of semen.
TL;DR: It is argued that testing in these circumstances should not affect the workers' ability to obtain life insurance cover at normal rates and a record of the injury and documentation of subsequent seroconversion if it occurs would allow the workers to obtain injury benefits more easily and give them a better case should they wish to obtain compensation from their employer through a civil claim.