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Key Points Question Is seasonality a risk factor associated with extremely preterm birth? Findings In this cohort study of more than 1 million pregnancies involving 662 338 pregnant individuals in Denmark,… Click to show full abstract
Key Points Question Is seasonality a risk factor associated with extremely preterm birth? Findings In this cohort study of more than 1 million pregnancies involving 662 338 pregnant individuals in Denmark, season during gestation was associated with extremely preterm birth. Gestation during autumn was associated with the highest rate of extremely preterm birth, whereas gestation during winter was associated with the lowest rate. Meaning This study found that season during gestation was associated with extremely preterm birth, suggesting the presence of risk factors associated with seasonality that may be preventable.
Journal Title: JAMA Network Open
Year Published: 2022
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