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Hormones

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The effects of postnatal exposure of endocrine disruptors on testicular function: a systematic review and a meta-analysis

  • Despoina BliatkaEmail author
  • Meletios P. Nigdelis
  • Katerina Chatzimeletiou
  • George Mastorakos
  • Stefania Lymperi
  • Dimitrios G. Goulis
Review Article

Abstract

Background

Despite many epidemiological studies having been conducted, the impact of postnatal exposure of endocrine disruptors (EDs) on testicular function remains a controversial issue.

Aim

To systematically review the literature and perform a quantitative synthesis to evaluate the effect of EDs on testicular function.

Materials and methods

A comprehensive search was conducted in the MEDLINE, Scopus, and CENTRAL databases. Eligible for the systematic review were observational (cross-sectional and cohort) studies with (i) adult men who had a high probability of postnatal exposure to EDs (“exposed”), (ii) adult men who had a low probability of postnatal exposure to EDs (“non-exposed”), and (iii) an outcome of interest [seminal parameters and reproductive hormone concentrations]. The continuous outcomes in each of the studies were synthesized by the random effects model and expressed as standardized mean difference (SMD) with 95% confidence interval (CI).

Results

Thirteen studies, including 959 exposed and 907 non-exposed men, fulfilled the inclusion criteria. Exposure to EDs was associated with decreased LH [SMD − 0.17, 95% CI − 0.33 to − 0.02, 10 studies (616 exposed, 563 non-exposed), I2 40%, p = 0.09], progressive motility [SMD − 0.45, 95% CI − 0.77 to − 0.13, three studies (133 cases, 153 controls), I2 38%, p = 0.20], and normal morphology [SMD − 0.50, 95% CI − 0.85 to − 0.14, eight studies (562 cases, 540 controls), I2 87%, p < 0.01] compared with non-exposure. No difference was observed between the other study groups.

Conclusions

Postnatal exposure to EDs is associated with decreased semen quality. Nevertheless, there is no evidence that a disruption of testicular function mediates the deterioration in semen quality.

Keywords

Endocrine disruptors Hormone disruption Male infertility Sperm parameters 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

42000_2019_170_MOESM1_ESM.doc (4.8 mb)
ESM 1 (DOC 4891 kb)

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Copyright information

© Hellenic Endocrine Society 2020

Authors and Affiliations

  • Despoina Bliatka
    • 1
    Email author
  • Meletios P. Nigdelis
    • 2
  • Katerina Chatzimeletiou
    • 3
  • George Mastorakos
    • 4
  • Stefania Lymperi
    • 2
  • Dimitrios G. Goulis
    • 2
  1. 1.1st Department of Obstetrics and GynecologyPapageorgiou General HospitalThessalonikiGreece
  2. 2.1st Department of Obstetrics and Gynecology, Unit of Reproductive EndocrinologyAristotle University of ThessalonikiThessalonikiGreece
  3. 3.1st Department of Obstetrics and Gynecology, Unit for Human ReproductionAristotle University of ThessalonikiThessalonikiGreece
  4. 4.2nd Department of Obstetrics and Gynecology, Unit of Endocrinology, Diabetes mellitus and MetabolismNational and Kapodistrian University of AthensAthensGreece

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