A nationwide analysis of more than 216,000 pregnant women in China has found that prenatal mental distress symptoms rose as high as 31.8%, and that the residential environment around expectant mothers appears to play a measurable role in that burden. The study, published in Nature Cities, analyzed a Chinese nationwide 13-year maternity cohort involving 216,442 pregnant women, with the Zhejiang Environmental and Birth Health Research Alliance listed among the collaborative research networks on the article. Its central message is that maternal mental health is not shaped by any single hazard in isolation, but by the composite environmental profile of the neighbourhoods where women live during pregnancy.
The research team, led by Haitong Zhe Sun with collaborators across a broad Chinese research network, framed the perinatal period as a particularly high-risk window for mental illness in women. They noted that maternal mental health research has often focused narrowly on postpartum depression, while psychological disturbances during pregnancy have received comparatively little attention. By analyzing the large cohort, the researchers identified a wide spectrum of risk determinants for prenatal mental distress, spanning socioeconomic disadvantages, behavioral vulnerabilities, medical histories and suboptimal residential environmental exposures.
The environmental component of the analysis produced striking numbers. The study estimated that 1.61 million prenatal mental distress symptoms were attributable to fine particulate matter (PM2.5) and heatwave exposure, with a 95% uncertainty interval of 1.35 to 1.88 million. In the opposite direction, green spaces were estimated to have prevented 791.7 thousand cases, with a 95% uncertainty interval of 648.1 to 948.9 thousand. These figures are model-based estimates with wide uncertainty intervals, rather than direct counts of diagnosed cases.
They constructed composite residential environmental profiles for cities and used them to characterize what they call maternal mental health liveability, together with measures of spatial equity in population access to healthier environments. Figure captions in the article indicate city-level composite residential environmental profiles and city- and provincial-level burden estimates of prenatal mental distress symptoms attributable to suboptimal environmental exposures.
A key contribution of the study is its delineation of multiple pathways through which urban greening appears to confer mental well-being benefits. According to the abstract, these include attenuation of pollution-associated stress, reduction of heatwave occurrence, encouragement of outdoor physical activity and intrinsic mental restoration.
The analysis also examined interactions between ambient environmental exposures and individual circumstances. Figure captions indicate risk interactions between ambient environmental exposures and effect modifications by COVID-19 infection history and pet companionship on the risk associations towards prenatal mental distress symptoms. The cohort profile figure indicates recruited participants from 2013 through 2025.
The authors positioned the work as policy-oriented evidence for fertility-supportive and health-promoting urban planning, explicitly connecting it to China’s three-child policy and the Healthy China 2030 blueprint. The authors positioned the work as policy-oriented evidence to inform fertility-supportive and health-promoting urban planning, echoing China's 'three-child policy' and 'Healthy China 2030' blueprint.
Several cautions are warranted when interpreting these results. The prevalence figure of 31.8% refers to a peak in prenatal mental distress symptoms across the cohort, not a uniform rate at all times or places. The attribution estimates come with substantial uncertainty intervals, and the abstract describes multiple pathways through which urban greening confers mental well-being benefits rather than demonstrating that any specific intervention will produce those benefits in a given city. The study population is Chinese, and environmental profiles, healthcare systems and cultural contexts differ elsewhere, so extrapolation to other countries should be made carefully.
The study provides city-level composite residential environmental profiles, maternal mental health liveability and spatial equity in population access, according to the figure captions. The study provides policy-oriented evidence to inform fertility-supportive and health-promoting urban planning, echoing China's 'three-child policy' and 'Healthy China 2030' blueprint.
Subject of Research: Environmental determinants of prenatal mental distress in a large Chinese maternity cohort
Article Title: Maternal mental health liveability shaped by composite residential environmental profiles
Article References: Sun, H. Z., Duan, C., Bai, X., Chen, H., Tian, Y., Gao, J., Tang, H., Xiang, Q., Wang, Z., Liu, H., Zhang, C., Luo, X., Li, H., Guo, Y., Xu, Y., Lao, H., Chen, Y., Zhai, J., Yimiti, R., … Planetary Health Axis System (PHAS) Collaborative Research Network (2026). Maternal mental health liveability shaped by composite residential environmental profiles. Nature Cities. https://doi.org/10.1038/s44284-026-00534-9
Image Credits: AI Generated
DOI: 10.1038/s44284-026-00534-9
Keywords: prenatal mental health, maternal health, PM2.5, heatwaves, urban green space, China, cohort study, environmental exposure, urban planning, mental distress, liveability, Maternal
News Source: Harold Sullivan. (November 5, 2026). Green space, clean air and cooler streets shape mental health of pregnant women in China. Scienmag.
