![Care of a third- or fourth-degree tear that occurred during childbirth (also known as obstetric anal sphincter injury OASI) | RCOG Care of a third- or fourth-degree tear that occurred during childbirth (also known as obstetric anal sphincter injury OASI) | RCOG](https://www.rcog.org.uk/media/f11dlxi5/types-of-tears.jpg?width=500&height=494)
Care of a third- or fourth-degree tear that occurred during childbirth (also known as obstetric anal sphincter injury OASI) | RCOG
![Surgical repair and follow-up of chronic 4th degree obstetric perineal tear (total perineal defect) in 2 centres in eastern Africa | International Urogynecology Journal Surgical repair and follow-up of chronic 4th degree obstetric perineal tear (total perineal defect) in 2 centres in eastern Africa | International Urogynecology Journal](https://media.springernature.com/m685/springer-static/image/art%3A10.1007%2Fs00192-021-04841-8/MediaObjects/192_2021_4841_Fig1_HTML.png)
Surgical repair and follow-up of chronic 4th degree obstetric perineal tear (total perineal defect) in 2 centres in eastern Africa | International Urogynecology Journal
![A) Third degree tear affecting the anal sphincter; (B) fourth degree... | Download Scientific Diagram A) Third degree tear affecting the anal sphincter; (B) fourth degree... | Download Scientific Diagram](https://www.researchgate.net/publication/45151017/figure/fig1/AS:667191783460871@1536082325426/A-Third-degree-tear-affecting-the-anal-sphincter-B-fourth-degree-tear-extending-to.png)
A) Third degree tear affecting the anal sphincter; (B) fourth degree... | Download Scientific Diagram
![Perineal Tearing in Labor - Part 2: What we know about why the perineum tears and how to modify risks — Dr. Lauren Keller, Chiropractor Perineal Tearing in Labor - Part 2: What we know about why the perineum tears and how to modify risks — Dr. Lauren Keller, Chiropractor](https://images.squarespace-cdn.com/content/v1/5ac65c733c3a537dfcfee198/1578420129194-BZJULGBEXEGMXBQBE1H6/Risk+Factors+for+perineal+trauma_.png?format=500w)