Delivery after an obstetric anal sphincter tear
Published 10 June 2020 This population-based case–control study included women who experienced OASIS 1997–2002. 26,598 women with OASIS were included from countries with low (Finland) and high (Norway and Sweden) OASIS incidences. Each case was matched with one background-adjusted control without OASIS. A follow-up data, including all subsequent deliveries between 1998 and 2011 were then collected
https://www.lupop.lu.se/article/delivery-after-obstetric-anal-sphincter-tear - 2025-03-09