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Residential greenness is associated with reduced low birth weight risk in maternal populationsMore greenery near homes may lower risk of low birth weight

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Key Takeaway
Note that residential greenness is associated with lower low birth weight risk, especially within 300 meter buffers.

This umbrella review synthesizes existing research on how residential greenness, measured via Normalized Difference Vegetation Index (NDVI), impacts maternal and neonatal outcomes. The analysis focused on the association between proximity to green spaces and risks of low birth weight (LBW) and preterm birth (PTB).

The meta-analysis found consistent reductions in LBW risk associated with 300 and 500 meter buffers. The strongest and most consistent association for reduced LBW was observed specifically within the 300 meter buffer. However, evidence regarding preterm birth was noted as heterogeneous and insufficient to support a pooled estimate.

Limitations include inconsistent findings across reviews concerning preterm birth, which were graded as inadequate. The study does not establish a causal link between greenness and birth outcomes; results are based on associations only. Evidence for LBW is graded as limited.

These findings may inform health impact assessments and the integration of green infrastructure into urban planning and maternal health policies. Clinicians should note that while associations exist, the data do not confirm causality or provide sufficient evidence regarding preterm birth.

For many families, the environment where a mother lives during pregnancy plays a significant role in health. A recent review looked at how 'greenness'—the amount of vegetation and greenery in residential areas—impacts birth outcomes for mothers and newborns.

The findings show a consistent link between living near green spaces and a lower risk of low birth weight. This connection was strongest when the greenery was within 300 meters of the home. While the study shows a promising association, it is important to note that these results do not prove that green space directly causes better health outcomes.

While the data for low birth weight was consistent, the evidence regarding preterm births was too varied and limited to draw a clear conclusion. These findings suggest that incorporating more green infrastructure into urban planning could be a valuable tool for improving maternal and neonatal health policies.

What this means for you:
Living near greenery (within 300 meters) is linked to lower risks of low birth weight in newborns.

Common questions

How does living near green space affect birth outcomes?

The study found a consistent reduction in the risk of low birth weight for infants when mothers lived near green areas. This effect was most consistent and strongest when the greenery was located within 300 meters of the home.

Does living near trees prevent premature births?

The evidence regarding preterm birth was inconsistent and insufficient to provide a clear answer. Because the data was so varied, researchers could not determine if green space specifically impacts how early a baby is born.

Does this mean green space causes healthier babies?

The study shows an association between greenness and lower birth weight risk, but it does not establish a direct cause. Because the evidence for low birth weight was graded as limited, you should speak with a healthcare provider about your specific needs.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
Residential green space is increasingly recognized as a potential protective factor for maternal and neonatal health, yet the evidence regarding its association with low birth weight (LBW) and preterm birth (PTB) remains inconsistent. Existing reviews differ substantially in exposure assessment, analytical methods, and reporting standards. The objective of this umbrella review was to evaluate the strength and coherence of current evidence and to generate harmonized quantitative estimates suitable for use in environmental health assessment. Systematic reviews published from 2020 to April 2025 were identified using predefined PECOS (Population, Exposure, Comparator, Outcome, Study design) criteria. Review quality was assessed using Measurement Tool to Assess Systematic Reviews (AMSTAR 2) and its environmental health extension (AMSTAR 2-EH). When the body of evidence was judged at least limited, a harmonized meta-analysis of the primary studies included in previous reviews was conducted. Effect estimates were transformed to a common exposure metric corresponding to a 0.1-unit increase in the Normalized Difference Vegetation Index (NDVI) and pooled using random-effects models stratified by residential buffer size. Nine systematic reviews met the inclusion criteria. The overall evidence was graded as limited for low birth weight and inadequate for preterm birth. The harmonized quantitative synthesis showed consistent reductions in LBW risk in association with 300 and 500 meter buffers, with the strongest and most consistent association observed for the 300 meter buffer. Evidence for PTB was heterogeneous and insufficient to support a pooled estimate. Residential greenness is associated with reduced LBW risk, while evidence for PTB remains inadequate, reflecting inconsistent findings across reviews and important methodological limitations. Harmonized estimates provide sound parameters for health impact assessment and support the integration of green infrastructure into urban and maternal health policies. https://www.crd.york.ac.uk/PROSPERO/view/CRD42025646790, PROSPERO CRD42025646790.
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