- Laceration repair basic anatomy: https://www.youtube.com/watch?v=XCwdQd_b76Y&t=573s

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- 2nd degree perineal laceration repair: https://www.youtube.com/watch?v=-On-ffB6TDE

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- 3/4th degree external sphincter muscle repair: https://www.youtube.com/watch?v=nDwkVLw3ekE&t=382s