"Episiotomy" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.
MeSH information
An incision of the posterior vaginal wall and a portion of the pudenda which enlarges the vaginal introitus to facilitate delivery and prevent lacerations.

This graph shows the total number of publications written about "Episiotomy" by people in this website by year, and whether "Episiotomy" was a major or minor topic of these publications.
Bar chart showing 329 publications over 19 distinct years, with a maximum of 40 publications in 2017
To see the data from this visualization as text, click here.