Fetal Lead Exposure: Timing Is Everything for Effects
2006
Fetal Lead Exposure: Timing Is Everything for Effects
Sample size: 146
publication
Evidence: moderate
Author Information
Author(s): Potera Carol
Hypothesis
Does the timing of prenatal lead exposure affect infant neurodevelopment?
Conclusion
Fetal lead exposure during the first trimester has a greater impact on later neurodevelopment than exposure in other trimesters.
Supporting Evidence
- Lead exposure during the first trimester was more strongly linked to decreases in MDI scores than exposure during later trimesters.
- Maternal plasma lead was the best predictor of a child’s neurobehavioral performance.
Takeaway
If a mom has lead in her body during the first part of her pregnancy, it can hurt her baby's brain more than if it happens later.
Methodology
The study measured lead levels in pregnant women during each trimester and assessed children's neurodevelopment at 24 months using the Mental Development Index.
Limitations
Plasma lead is expensive and difficult to measure, making routine clinical testing impractical.
Participant Demographics
Pregnant women living in Mexico City.
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