ArticleThe journal of obstetrics and gynaecology research2022
Threatened abortion, threatened premature labor, and preterm birth during the first state of emergency for COVID-19 in 2020 in Japan.
Article in The journal of obstetrics and gynaecology research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.
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Who cites it
10 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- The association of COVID-19 lockdowns with adverse birth and pregnancy outcomes in 28 high-income countries: a systematic review and meta-analysis.Nature human behaviour · 2025Pooled it
- Impacts of COVID-19 pandemic on preterm birth: a systematic review and meta-analysis.Public health · 2022Pooled it
- Associations Between Late-Night Shift Work and Perinatal Outcomes: A Nationwide Cross-Sectional Study Using JACSIS and JASTIS Data.The journal of obstetrics and gynaecology research · 2026Article
- Correlation analysis between changes in oral and vaginal/intestinal microbiota during pregnancy and threatened preterm birth in pregnant women.American journal of translational research · 2025Article
- Article
- Effects of the COVID-19 pandemic on the rates of adverse birth outcomes and fetal mortality in Japan: an analysis of national data from 2010 to 2022.BMC public health · 2024Article
- The COVID-19 pandemic affects pregnancy complications and delivery outcomes in Japan: a large-scale nationwide population-based longitudinal study.Scientific reports · 2023Article
- COVID-19, maternal, and neonatal outcomes: National Mother-Child Cohort (NMCC) of K-COV-N cohort in South Korea.PloS one · 2023Article
- Amelioration of prevalence of threatened preterm labor during the COVID-19 pandemic: nationwide database analysis in Japan.Scientific reports · 2022Article
- Article
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Funding
Abstract
aimThis study examined the maternal experience of threatened abortion, threatened premature labor, or preterm birth before, during, and after the first state of emergency for COVID-19 in 2020 in Japan.
methodsThis was a cross-sectional, internet-based questionnaire survey. We recruited 600 postpartum women and divided them into three groups by date of delivery: before (October 2019-March 2020), during (April-May 2020), and after (June-October 2020) the first state of emergency. The outcome was the presence of at least one of the following complications: threatened abortion, threatened premature labor, and/or preterm birth. The prevalence ratios (PRs) of the outcome were calculated and compared among the three groups using a multivariable Poisson regression model with adjustment for potential confounders.
resultsOf the 553 women eligible for analysis, those who delivered during (PR 0.69, 95% confidence interval [CI] 0.47-0.99) and after (PR 0.62, 95% CI 0.42-0.90) the state of emergency were less likely to have experienced either threatened abortion, threatened premature labor, or preterm birth than those who delivered before the state of emergency. Among the adjustment variables, smoking at the time of survey (PR 1.68, 95% CI 1.01-2.80) and living in the prefectures with a population of >5 million (PR 0.71, 95% CI 0.51-0.97) were associated with the study outcome.
conclusionThreatened abortion, threatened premature labor, or preterm birth appeared to decrease during and after the first state of emergency in 2020. The longitudinal effects of coronavirus disease on maternal and newborn health should be monitored continuously.
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