"Obstetric anal sphincter injury after episiotomy in vacuum extraction: an epidemiological study using an emulated randomized trial approach".

CONCLUSIONS: Lateral or mediolateral episiotomy reduced the prevalence of OASIS in nulliparous women delivered with vacuum extraction, compared to women with no episiotomy. PMID: 33539612 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/33539612?dopt=Abstract

Source: BJOG : An International Journal of Obstetrics and Gynaecology - February 4, 2021 Category: OBGYN Authors: Ankarcrona V, Zhao H, Jacobsson B, Brismar Wendel S Tags: BJOG Source Type: research