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Related Experiment Videos

Phthalate exposure and human semen parameters.

Susan M Duty1, Manori J Silva, Dana B Barr

  • 1Department of Environmental Health, Occupational Health Program, Harvard School of Public Health, Boston, MA 02115, USA.

Epidemiology (Cambridge, Mass.)
|July 16, 2003
PubMed
Summary
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Exposure to phthalates, chemicals linked to reproductive toxicity, may negatively impact human semen quality. This study found dose-response relationships between certain phthalate metabolites and reduced sperm concentration and motility in men.

Area of Science:

  • Environmental Health
  • Reproductive Toxicology
  • Human Seminology

Background:

  • Phthalates are common chemicals with known reproductive toxicity in animals and hormonal activity.
  • Human exposure to phthalates occurs via diet, consumer products, and medical devices.
  • Concerns exist regarding phthalates' impact on human reproductive health.

Purpose of the Study:

  • To investigate the association between environmental phthalate metabolite levels and human semen quality.
  • To explore potential dose-response relationships between phthalate exposure and semen parameters.

Main Methods:

  • 168 men from subfertile couples undergoing semen analysis were recruited.
  • Semen parameters (sperm concentration, motility, morphology) were assessed and dichotomized.

Related Experiment Videos

  • Eight phthalate metabolites were quantified in urine using HPLC-MS/MS and categorized into tertiles.

    • Main Results:

    • A dose-response relationship was observed between mono-butyl phthalate (MBP) tertiles and decreased sperm motility and concentration.
    • Mono-benzyl phthalate (MBzP) tertiles showed a dose-response association with reduced sperm concentration.
    • Suggestive evidence indicated a link between monomethyl phthalate (MMP) and altered sperm morphology.

    Conclusions:

    • Dose-response associations were found for MBP and MBzP with specific semen parameters.
    • Monobutyl phthalate and monobenzyl phthalate exposure may negatively impact male fertility markers.
    • Differences in spermatotoxicity among various phthalates are suggested, warranting further investigation.