title: Pelvic structure and function at 1 month compared to 7 months by dynamic magnetic resonance after vaginal birth.
abstract: OBJECTIVE
  We sought to determine whether changes exist in location and movement of pelvic floor structures at 1 and 7 months postpartum.
  
  
  METHODS
  Midsagittal magnetic resonance images from 13 primiparous women with birth events associated with levator ani damage at early ( approximately 1 month) and late ( approximately 7 months) postpartum time points were analyzed. Pelvic floor structure locations at rest and displacements from rest to maximum Kegel and Valsalva were determined. Urogenital and levator hiatus diameters were measured as well.
  
  
  RESULTS
  The perineal body was 7.1 mm and anal verge 7.9 mm higher at 7 months postpartum (P = .003). Both the urogenital and levator hiatus diameters were smaller at 7 months (P < .05). Displacement during Kegel and Valsalva was similar between the 2 time points.
  
  
  CONCLUSIONS
  Resting locations of the perineal body and anal verge are higher at 7 months postpartum, but the amount of movement during Kegel or Valsalva does not change.
authors.affiliation: Department of Obstetrics and Gynecology, University of Michigan Hospital, Ann Arbor, MI, USA. aishayou@med.umich.edu
authors.forename: Aisha A
authors.initials: AA
authors.lastname: Yousuf
authors.forename: John O L
authors.initials: JO
authors.lastname: DeLancey
authors.forename: Catherine J
authors.initials: CJ
authors.lastname: Brandon
authors.forename: Janis M
authors.initials: JM
authors.lastname: Miller
mesh_terms: D000328:Adult; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D017773:Pelvic Floor / Q000033:anatomy & histology / Q000502:physiology*; D013997:Time Factors; D014621:Vagina
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