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Objectives. To identify trajectory patterns of maternal depressive symptoms and perceived stress from midpregnancy to 2 years postpartum and determine relationships with selected sociodemographic factors including income, education, immigration, and postpartum employment. Methods. Pregnant women (n = 3307) recruited from the general population in 4 regions in Canada provided 6 waves of data from pregnancy to 2 years postpartum. The study was conducted from 2009 to 2015. Results. We determined 5 trajectory groups distinguished by time and magnitude for both depressive symptoms and perceived stress. Immigrants living in Canada for more than 5 up to 10 years, but not more recent arrivals, were at higher risk for persistent stress and depression independent of income status. Being employed at 1 year postpartum was associated with a lower likelihood of postpartum depression and perceived stress, while mothers reporting work exhaustion were substantially more likely to experience persistent depression and stress. Conclusions. The study highlighted the heterogeneous nature of depressive symptoms and perceived stress. Targeting interventions toward women 5 to 10 years after immigration and those experiencing exhaustion from postpartum work may be particularly beneficial.

BackgroundA growing number of studies observe associations between the amount of green space around a mother’s home and positive birth outcomes; however, the robustness of this association and potential pathways of action remain unclear. ObjectivesTo examine associations between mother’s residential green space and term birth weight within the Canadian Healthy Infant Longitudinal Development (CHILD) study and examine specific hypothesized pathways.MethodsWe examined 2510 births located in Vancouver, Edmonton, Winnipeg, and Toronto Canada. Green space was estimated around mother’s residences during pregnancy using Landsat 30 m normalized difference vegetation index (NDVI). We examined hypothesized pathways of: (1) reduction of environmental exposure; (2) built environment features promoting physical activity; (3) psychosocial conditions; and (4) psychological influences. Linear regression was used to assess associations between green space and term birth weight adjusting first for a comprehensive set of confounding factors and then incrementally for pathway variables.ResultsFully adjusted models showed non-statistically significant increases in term birth weight with increasing green space. For example, a 0.1 increase in NDVI within 500 m was associated with a 21.5 g (95% CI − 4.6, 47.7) increase in term birth weight. Associations varied by city and were most robust for high-density locations. For the two largest cities (Vancouver and Toronto), we observed an increase in birth weight of 41.2 g (95% CI 7.8, 74.6) for a 0.1 increase in NDVI within 500 m. We did not observe substantial reductions in the green space effect on birth weight when adjusting for pathway variables.ConclusionOur results highlight the need to further characterize the interactions between green space, urban density and climate related factors as well as the pathways linking residential green space to birth outcomes.