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Published on: January 7, 2018
Air pollution and fetal brain morphological development: a prospective cohort study.
Laura Gómez-Herrera1, Yu Zhao2, Ioar Rivas3
1Barcelona Institute for Global Health, ISGlobal, Barcelona, Spain; Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain; Spanish Consortium for Research on Epidemiology and Public Health, Madrid, Spain.
Prenatal exposure to air pollution, including nitrogen dioxide and particulate matter, may impact fetal brain development, altering structures like the ventricles and cerebellum. These findings underscore the need for cleaner urban air to protect developing fetuses.
Area of Science:
- Environmental Health
- Neuroscience
- Prenatal Development
Background:
- Limited evidence exists on prenatal air pollution exposure's effects on the developing human fetal brain.
- Assessing fetal brain morphology prenatally is crucial for understanding early developmental impacts.
Purpose of the Study:
- To evaluate the association between exposure to common air pollutants during pregnancy and fetal brain morphology.
- To identify specific air pollutants and vulnerable developmental windows impacting fetal brain development.
Main Methods:
- Prospective cohort study of 1080 pregnant women in Barcelona, Spain.
- Exposure assessment integrated time-activity patterns with land use regression and dispersion models for NO2, PM2.5, and black carbon.
- Third-trimester transvaginal neurosonography assessed fetal brain morphology; regression models analyzed associations.
Main Results:
- Prenatal exposure to NO2, PM2.5, and black carbon was linked to wider lateral ventricles and a larger cerebellar vermis.
- Higher black carbon exposure correlated with a shallower Sylvian fissure.
- Multipollutant models indicated persistent associations with black carbon, while NO2 and PM2.5 effects diminished for some metrics.
Conclusions:
- Air pollution exposure during pregnancy can affect fetal brain morphological development.
- Findings suggest a critical vulnerability window in mid-to-late pregnancy.
- Mitigating urban air pollution is essential for protecting fetal brain development.
