ArticleJournal of global health2025
Associations between season of conception and maternal and perinatal health: a prospective birth cohort study.
Article in Journal of global health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Global maternal health progress stagnated during the Sustainable Development Goal era, while the impact of meteorological conditions on maternal-infant outcomes remains contentious. We aimed to investigate the relationship between the season of conception and adverse perinatal outcomes. Methods: We conducted a prospective cohort study, collecting basic demographic characteristics of pregnant women and estimating the season of conception based on the date of the last menstrual period. We did a follow-up until delivery to monitor pregnancy health issues, such as gestational diabetes mellitus (GDM), gestational hypertension (GH), premature rupture of membranes (PROM), and postpartum haemorrhage (PPH), as well as neonatal health indicators such as birth weight and other relevant outcomes. Results: We included data from 26 341 pregnant women in our analysis. The average age of pregnant women was 30.3 years (standard deviation (SD) = 4.0), and 60.9% were primiparas. Compared to conception in spring (reference group), conception in summer was associated with a 15% reduction in GDM risk (odds ratio (OR) = 0.85; 95% confidence interval (CI) = 0.77-0.94) and a 10% lower PROM risk (OR = 0.90; 95% CI = 0.82-0.99), but a 46% increased PPH risk (OR = 1.46; 95% CI = 1.07-1.99). Conceptions in autumn and winter demonstrated even more pronounced protective effects, with the former showing a GDM risk reduction of 23% (OR = 0.77; 95% CI = 0.70-0.85) and 26% lower GH risk (OR = 0.74; 95% CI = 0.61-0.90), and the latter a 14% GDM risk reduction (OR = 0.86; 95% CI = 0.79-0.94) and 20% lower GH risk (OR = 0.80; 95% CI = 0.68-0.96). Conclusions: We found that conception in spring was associated with an increased risk of GDM, GH, and PROM, while conception in summer was linked to a higher risk of PPH. However, the preliminary nature of our findings suggests that further research is needed to confirm causality and assess the feasibility of any potential interventions.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.