Assessment of Seasonality and Extremely Preterm Birth in Denmark.

ABSTRACT:

Importance

Preterm birth, particularly extremely preterm birth, has been associated with substantial morbidity and mortality. Research during SARS-CoV-2-related lockdowns revealed reductions in the more severe subtypes of preterm birth in some countries, suggesting the presence of preventable risk factors, such as infectious diseases or social behavior. Seasonality may provide a similar means of assessing natural changes in the daily life of pregnant individuals that were similar to those experienced during the COVID-19 lockdown period.

Objective

To evaluate the association between seasonality and extremely preterm birth.

Design, setting, and participants

This nationwide cohort study included 1 136 143 pregnancies in Denmark with onset between January 1, 1997, and Dec

SUBMITTER: Hviid A 

PROVIDER: S-EPMC8814911 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature