Semen quality over a 10‐year period in 22,249 men in Korea

Seo, Ju Tae; Rha, Koon Ho; Park, Yong Seog; Lee, Moo Sang

doi:10.1046/j.1365-2605.2000.00226.x

Cited by 35 publications

(27 citation statements)

References 46 publications

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“…For example, Tortolero et al (1999) reported on a longitudinal investigation of Venezuelan men in which sperm counts remained well within the range of clinical acceptability with little or no change over a period of 15 years. An extensive study of sperm count and quality in Korean men over a span of 10 years also yielded similar results, although 19% of the men exhibited azoospermia, suggesting that male subfecundity merits further investigation in this population (Seo et al, 2000). Results from Europe also fail to document any significant longitudinal changes in sperm quality or count (Andolz et al, 1999;Berling and Wolner-Hanssen, 1997;Rasmussen et al, 1997).…”

Section: Sperm Countmentioning

confidence: 81%

Reproductive ecology and life history of the human male

Bribiescas

2001

Am. J. Phys. Anthropol.

210

117

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Until recently, the reproductive ecology of human males has not been extensively investigated, primarily as a result of the need for a theoretical framework based on the reproductive constraints and energetics of mammalian males. More specifically, male reproductive ecology has necessitated an integrative interpretation of clinical and anthropological data based on the premise that the evolution of human male life histories has involved selection for physiological mechanisms aimed at optimizing trade-offs between survivorship and reproductive effort. This paper attempts to address this gap in our understanding by presenting the current state of male reproductive ecology, including physiologic data from clinical and anthropological investigations as well as recent theoretical developments. Recent investigations outlining population variation in reproductive endocrine function are discussed within the context of potential sources of variation, including energetic expediture, caloric intake, and developmental canalization during adolescence. Additional summaries of male senescence and behavior are presented to provide a complete overview of male life history. Implications of recent anthropological data on contemporary health issues such as prostate cancer and the development of a male contraceptive are also discussed. Finally, several theories are presented that may contribute to our understanding of the evolution of male life histories and reproductive ecology, including theoretical suggestions involving the role of competition, mate choosiness, and potential constraints on male insemination ability, as well as a theory suggesting that male reproductive ecology may be best understood by analyzing energetic allocation decisions between differing somatic tissues that may be indicative of the competing needs for optimizing survivorship and reproductive effort. Directions for future research are finally considered.

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Section: Sperm Countmentioning

confidence: 81%

Reproductive ecology and life history of the human male

Bribiescas

2001

Am. J. Phys. Anthropol.

210

117

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“…Studies from Italy, Denmark, Canada, Tunisia, India, Poland, Israel, Scotland, Greece and Germany suggest that there has been a decline, or sperm parameters are impaired in young populations (Adamopoulos et al, 1996;Younglai et al, 1998;Bilotta et al, 1999;Almagor et al, 2003;Vicari et al, 2003;Jørgensen et al, 2006;Sripada et al, 2007;Adiga et al, 2008;Paasch et al, 2008;Horak et al, 2008;Feki et al, 2009). Conversely, other reports from US, Japan, Korea, Sweden, Spain, Israel and Czech Republic showed no significant evidence of deterioration in sperm quality (Fisch et al, 1996;Paulsen et al, 1996;Benshushan et al, 1997;Berling & Wölner-Hanssen, 1997;Andolz et al, 1999;Seo et al, 2000;Itoh et al, 2001;Zvĕrina et al, 2002). The materials and methods of the studies mentioned varied widely, as well as time period (one, two, or more decades), population sample (e.g.…”

Section: Pesticides and Semen Qualitymentioning

confidence: 99%

Pesticide Exposure and Health Related Issues in Male and Female Reproductive System

Sifakis¹,

Mparmpas²,

Tsatsakis³

2011

Pesticides - Formulations, Effects, Fate

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“…[1][2][3][4][5][6][7][8] By contrast, other studies have shown no evidence of deteriorating semen quality. [9][10][11][12][13][14][15][16] Some studies concern infertile couples, while others analyse normal sperm parameters. Thus, a worldwide decreasing trend in semen parameter values can be neither confirmed nor rejected.…”

Section: Introductionmentioning

confidence: 99%

Decline of semen quality among 10 932 males consulting for couple infertility over a 20-year period in Marseille, France

Geoffroy-Siraudin¹,

Loundou²,

Romain³

et al. 2012

Asian J Androl

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Semen from 10 932 male partners of infertile couples was analysed and sperm parameter trends were evaluated at the Reproduction Biology Laboratory of the University Hospital of Marseille (France) between 1988 and 2007. After 3-6 days of abstinence, semen samples were collected. Measurements of seminal fluid volume, pH, sperm concentration, total sperm count, motility and detailed morphology of spermatozoa were performed. Sperm parameters were analysed on the entire population and in men with normal total numeration (o40 million per ejaculate). The whole population demonstrated declining trends in sperm concentration (1.5% per year), total sperm count (1.6% per year), total motility (0.4% per year), rapid motility (5.5% per year) and normal morphology (2.2% per year). In the group of selected samples with total normal sperm count, the same trends of sperm quality deterioration with time were observed. Our results clearly indicate that the quality of semen decreased in this population over the study period. Keywords: environment; male infertility; regional differences; semen quality; sperm parameters INTRODUCTION Numerous studies suggest a decline in semen quality in some parts of the world. 1-8 By contrast, other studies have shown no evidence of deteriorating semen quality. 9-16 Some studies concern infertile couples, while others analyse normal sperm parameters. Thus, a worldwide decreasing trend in semen parameter values can be neither confirmed nor rejected. 17 It was recently reported that fecundity is affected by this decrease. 18,19 It was speculated that decreasing sperm parameters are in response to adverse environmental factors. Nevertheless, the observed discrepancies between studies suggest regional differences in semen quality. [20][21][22] Variations in environmental factors, industrial pollution and/or lifestyle could explain these discrepancies. A large number of environmental factors can pollute air, drinking water and food. This can directly alter the male gonad by blood-testis barrier disruption and cellular toxicity, or disrupt androgen biosynthesis and action. Among these environmental factors, oestrogenic or anti-androgenic endocrine disrupting compounds inhibit critical cellular process controlling steroidogenesis in Leydig cells and androgen binding to the androgen receptor. 23 It has been hypothesized that endocrine disrupting compounds play a major role in the aetiology of increased incidence of testicular dysgenesis syndrome which gathers decreased quality of semen, cryptorchidism, hypospadias and testicular cancer. 24 Chemicals with hormone-like activity can also

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Semen quality over a 10‐year period in 22,249 men in Korea

Cited by 35 publications

References 46 publications

Reproductive ecology and life history of the human male

Reproductive ecology and life history of the human male

Pesticide Exposure and Health Related Issues in Male and Female Reproductive System

Decline of semen quality among 10 932 males consulting for couple infertility over a 20-year period in Marseille, France

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