1. Impact of pregnancy and delivery on pelvic floor biomechanics;Alperin,2016
2. The effect of pregnancy on the pelvic floor;Betschart,2017
3. Levator ani muscle stretch induced by simulated vaginal birth;Lien;Obstet Gynecol,2004
4. How much does the levator hiatus have to stretch during childbirth?;Svabík;BJOG,2009
5. Perineal care;Kettle;Clin Evid,2011