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Please cite this paper as: Hirayama F, Koyanagi A, Mori R, Zhang J, Souza J, Gülmezoglu A. Prevalence and risk factors for third‐ and fourth‐degree perineal lacerations during vaginal delivery: a multi‐country study. BJOG 2012;119:340–347.
Objective To investigate the prevalence and risk factors of third‐ and fourth‐degree perineal lacerations in 24, mainly developing, countries.
Design Analysis...
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