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Elevated Micro- and Nanoplastics Detected in Preterm Human Placentae.

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Micro- and nanoplastics (MNPs) were found in higher concentrations in placentae from preterm births. Specific MNPs like PVC and PC were linked to preterm birth, suggesting a potential health risk.

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Area of Science:

  • Environmental Health
  • Reproductive Science
  • Toxicology

Background:

  • Micro- and nanoplastics (MNPs) are increasingly detected across environmental, dietary, and biological samples.
  • Concerns are rising regarding the potential health impacts of MNP exposure.
  • The relationship between MNP exposure and preterm birth (PTB) has not been previously investigated.

Purpose of the Study:

  • To quantify MNP polymers in placentae from term and preterm deliveries.
  • To investigate the association between MNP concentrations and PTB.
  • To identify specific MNP types linked to PTB and adverse pregnancy outcomes.

Main Methods:

  • Quantification of 12 MNP polymers in placental tissues from 87 term and 71 preterm deliveries.
  • Utilized pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) for MNP analysis.
  • Employed logistic regression to identify independent predictors of PTB.

Main Results:

  • Cumulative MNP concentrations were significantly higher (28%) in placentae from PTB compared to term deliveries.
  • Elevated levels of polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyurethane (PU), and polycarbonate (PC) were observed in PTB placentae.
  • PET, PU, and PC inversely correlated with gestational age and birth weight; PVC and PC were identified as independent predictors of PTB.

Conclusions:

  • This study provides the first evidence linking MNP presence in placentae to preterm birth.
  • Specific MNPs, including PVC and PC, are associated with an increased risk of PTB.
  • Findings underscore the need to minimize MNP exposure during pregnancy to mitigate risks to maternal and neonatal health.