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Crude rate of stillbirth in a population-based cohort study of stillbirths and live births, by pregnancy order and maternal obesity status, Pennsylvania, 2006–2013. The crude stillbirth rate (with 95% bootstrapped confidence interval (CI)) is presented as the number of stillbirths per 1,000 pregnancies. Obesity was defined as body mass index (weight (kg)/height (m)2) ≥30. n = number of pregnancies.
