Circannual variation in human semen parameters

Andolz, P.; Bielsa, M.A.; Andolz, Ana

doi:10.1046/j.1365-2605.2001.00297.x

Cited by 32 publications

(25 citation statements)

References 28 publications

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“…Seasonal changes in semen quality have been reported in several locations (Gyllenborg et al, 1999;Andaloz et al, 2001;Chen et al, 2003Chen et al, , 2004Mallidis et al, 1991). In our study, during spring, when higher OP urinary levels were registered, lower levels of sperm concentration and sperm count were recorded.…”

Section: Semen Parameterssupporting

confidence: 50%

Organophosphorus pesticide exposure decreases sperm quality: association between sperm parameters and urinary pesticide levels

Recio-Vega¹,

Ocampo-Gomez²,

Borja-Aburto³

et al. 2008

J of Applied Toxicology

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Several studies have suggested that human semen quality has declined over the past decades and some of them have associated it with occupational exposure to pesticides. However, most of these studies have not been associated with a reliable exposure level and have been designed mostly as cross-sectional studies. The present work evaluates, in a longitudinal follow-up study, the effect of organophosphate pesticides (OP) at three occupational exposure levels on semen quality. In addition, the study examined the association between OP urinary levels and sperm parameters in exposed and unexposed workers. A total of 139 semen samples from 52 volunteers were assessed. Urinary OP levels were measured by gas-liquid chromatography. The results revealed that the poorest semen quality was found among the subjects with the highest OP exposure and the highest urinary OP levels. Seasonal variations in sperm concentration and sperm count were registered. The results showed a significant decrease in total sperm count among subjects with the highest exposure to OP. Further studies assessing the effects of OP on male reproductive health should be controlled by the variability in human sperm parameters, sperm seasonality, spermatogenesis time and the changing OP exposure level in men highly exposed to OP.

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Section: Semen Parameterssupporting

confidence: 50%

Organophosphorus pesticide exposure decreases sperm quality: association between sperm parameters and urinary pesticide levels

Recio-Vega¹,

Ocampo-Gomez²,

Borja-Aburto³

et al. 2008

J of Applied Toxicology

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show abstract

“…In humans, the effect of season rotation on sperm parameters is still controversial. Several studies confirmed a seasonal pattern of sperm variations (Andolz et al, 2001;Chen et al, 2004), whereas others did not (Menge and Beitner, 1989;Ombelet et al, 1996). The finding of seasonal change of chromatin condensation in human sperms seems to confirm this hypothesis (Henkel et al, 2001;Snyder, 1990).…”

Section: Discussionmentioning

confidence: 86%

Sperm quality and environment: A retrospective, cohort study in a Northern province of Italy

Santi

Vezzani

Granata

et al. 2016

Environmental Research

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“…With regard to sperm concentration and sperm motility and vitality, contradictory results have been published. While Mortimer et al (1983) and Ombelet et al (1996) could not find significant seasonal variations of these parameters, others clearly emphasize such an effect (Tjoa et al, 1982;Politoff et al, 1989;Saint Pol et al, 1989;Centola and Eberly, 1999;Andolz et al, 2001;Henkel et al, 2001). Seasonal variations in sperm concentration were clearly not attributable to differences in sexual abstinence (Gyllenborg et al, 1999).…”

Section: Discussionmentioning

confidence: 98%

Seasonal Changes of Neutral α‐Glucosidase Activity in Human Semen

Henkel

Maass

Schuppe

et al. 2006

Journal of Andrology

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ABSTRACT:Although there are contradictory reports, the biochemical evaluation of the seminal activity of neutral ␣-glucosidase (NAG) has repeatedly been described as an important parameter to test epididymal patency and is recommended by the WHO. Because, for a number of diagnostic parameters, seasonal variations have been described even in the human, it was the aim of this study to investigate possible circannual changes of NAG. This is an important aspect of andrological diagnosis, as seasonal changes of specific diagnostic parameters might have an impact on the accuracy and predictive power of these parameters, which in turn might have an effect on the therapeutic concept for the patients. In a total of 473 patients, sperm concentration, volume of the ejaculate, total motility, progressive motility, pH value, number of peroxidase-positive cells, concentration of fructose, and NAG as functional markers of the seminal vesicles and the epididymis, respectively, were analyzed according to standard procedures. Seminal activity of NAG was significantly correlated with the sperm concentration (P Ͻ .0001), ejaculate volume (P Ͻ .0001), and the pH (P ϭ .0025). Moreover, significant (P ϭ .0008) seasonal changes in the activity of seminal NAG with the maximum in spring (76.87 mU/ejaculate) and the minimum in autumn (58.55 mU/ejaculate) were found. The incidence of low-ranged activity of the enzyme was 9.2% in spring, while it was 20.3% in autumn. Thus, our data clearly demonstrate circannual changes of the seminal activity of neutral ␣-glucosidase. This in turn has clinical impact as the predictive power of the test system changes throughout the year.

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Circannual variation in human semen parameters

Cited by 32 publications

References 28 publications

Organophosphorus pesticide exposure decreases sperm quality: association between sperm parameters and urinary pesticide levels

Organophosphorus pesticide exposure decreases sperm quality: association between sperm parameters and urinary pesticide levels

Sperm quality and environment: A retrospective, cohort study in a Northern province of Italy

Seasonal Changes of Neutral α‐Glucosidase Activity in Human Semen

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