Changes

| The narrowest bony points formed by the '''sacrococcygeal joint''' and the '''pubic bone''' next to the symphysis.<ref group="notes">This is also called the ''obstetric anteroposterior diameter of the pelvic outlet'', to distinguish from the ''anatomic'' one which includes the coccyx.^a However, the coccyx is normally pushed away during childbirth by laxity in the sacrococcygeal joint.^b<br>a. [https://books.google.se/books?id=M9k0UMTAGAIC&pg=PA94 Page 94] in: {{cite book|title=Hacker & Moore's Essentials of Obstetrics and Gynecology|author=Neville F. Hacker, Joseph C. Gambone, Calvin J. Hobel|edition=5|publisher=Elsevier Health Sciences|year=2009|isbn=9781437725162}}<br>b. [https://books.google.se/books?id=oMfGQylCBMsC&pg=PT239 Page 239] in: {{cite book|title=Labor and Delivery Care: A Practical Guide|author=Wayne R. Cohen, Emanuel A. Friedman|publisher=John Wiley & Sons|year=2011|isbn=9781119971542}}</ref> || 9.5 to 11.5 cm.<ref name="pmid21509231"/> and the pubic bone by the symphysis.