biostudies-literatureBasu ANational Institute of Child Health and Human DevelopmentNIH HHSe0249780https://www.ebi.ac.uk/biostudies/studies/S-EPMC8059819biostudies-literatureUnknown16(4)Pregnant and postpartum women face unique challenges during the COVID-19 pandemic that may put them at elevated risk of mental health problems. However, few large-scale and no cross-national studies have been conducted to date that investigate modifiable pandemic-related behavioral or cognitive factors that may influence mental health in this vulnerable group. This international study sought to identify and measure the associations between pandemic-related information seeking, worries, and prevention behaviors on perinatal mental health during the COVID-19 pandemic. An anonymous, online, cross-sectional survey of pregnant and postpartum women was conducted in 64 countries between May 26, 2020 and June 13, 2020. The survey, available in twelve languages, was hosted on the Pregistry platformPloS oneA cross-national study of factors associated with women's perinatal mental health and wellbeing during the COVID-19 pandemic.PMC80598191R01HD102342Wyszynski DFKim HHCharron LKelsall NBasaldua RChoi KWHernandez-Diaz SKoenen KCBasu AfalseA cross-national study of factors associated with women's perinatal mental health and wellbeing during the COVID-19 pandemic.Pregnant and postpartum women face unique challenges during the COVID-19 pandemic that may put them at elevated risk of mental health problems. However, few large-scale and no cross-national studies have been conducted to date that investigate modifiable pandemic-related behavioral or cognitive factors that may influence mental health in this vulnerable group. This international study sought to identify and measure the associations between pandemic-related information seeking, worries, and prevention behaviors on perinatal mental health during the COVID-19 pandemic. An anonymous, online, cross-sectional survey of pregnant and postpartum women was conducted in 64 countries between May 26, 2020 and June 13, 2020. The survey, available in twelve languages, was hosted on the Pregistry platform2021-01-01T00:00:00Z20212025-04-18T16:50:15.491Z2025-04-07T04:15:32.084ZS-EPMC80598193388209610.1371/journal.pone.0249780