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Observational study finds that low BMI and high Bishop score influence spontaneous labor, highlighting membrane sweeping's effectiveness.
In prolonged pregnancy, the probability of going into spontaneous labor was only 50.9%. Low BMI and high Bishop score were associated with spontaneous onset of labor in case of expectant management. Membrane sweeping was associated with spontaneous labor in our post-term population after adjustment on parity, BMI and Bishop score.
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Marcoux et al. (2026) studied this question.
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