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Risk Factors for Complicated Lacerations

Maternal risk factorsDelivery risk factorsInfant risk factors
PrimiparityMidline episiotomy
+/- forceps/vacuum
OP presentation
+/- instrumental delivery
InfibulationVacuum or forceps useBirthweight >4000g
RaceMediolateral episiotomyPostmaturity
Age >27EpiduralMalpresentation
Maternal diabetesSecond stage >1hFetal distress
Shoulder dystocia
Water birth
Oxytocin augmentation
*Risk factors have been arranged in order of descending odds ratio
[Ref: Williams Obstetrics; OASIS – Prevention, Recognition, and Repair (JOGC Guideline 330)]
Updated on November 2, 2021

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