Journal of Medical Ultrasonics

, Volume 40, Issue 2, pp 125–131 | Cite as

Longitudinal comparison study of pelvic floor function between women with and without stress urinary incontinence after vaginal delivery

  • Mikako Yoshida
  • Ryoko Murayama
  • Megumi Haruna
  • Masayo Matsuzaki
  • Kenichi Yoshimura
  • Sachiyo Murashima
  • Shiro Kozuma
Original Article



To compare the pelvic floor function between women with and without stress urinary incontinence after vaginal delivery.


Seventeen women (age 35.5 ± 3.5) were prospectively studied at about 6 weeks, 3 months, and 6 months after vaginal delivery. Urinary incontinence was assessed by the International Consultation on Incontinence Questionnaire – Short Form. Pelvic floor function was assessed by antero-posterior diameter of the levator hiatus using transperineal ultrasound.


Five of 17 women experienced postpartum stress urinary incontinence. The antero-posterior diameter of the levator hiatus at rest was significantly longer in stress urinary incontinent women than in continent women until 3 months after delivery (p < 0.01), though shortening of the antero-posterior diameter of the levator hiatus was not significantly different between continent women and stress urinary incontinent women. Regardless of urinary incontinence, the antero-posterior diameter of the levator hiatus at rest shortened at 6 months postpartum, compared to 6 weeks postpartum (p < 0.001). The antero-posterior diameter of the levator hiatus during contraction had shortened only in continent women by 6 months postpartum (p = 0.02).


The extended pelvic floor may be a cause of stress urinary incontinence in the postpartum period. Therefore, treatment to improve the extended pelvic floor should be developed for the prevention of stress urinary incontinence.


Pelvic floor function Postpartum Stress urinary incontinence Transperineal ultrasound 



This study was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology; (C) 20592573. The authors are grateful to the participants for their cooperation.

Conflict of interest

The authors have no conflict of interest or relationships to disclose.


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Copyright information

© The Japan Society of Ultrasonics in Medicine 2012

Authors and Affiliations

  • Mikako Yoshida
    • 1
  • Ryoko Murayama
    • 2
  • Megumi Haruna
    • 3
  • Masayo Matsuzaki
    • 3
  • Kenichi Yoshimura
    • 4
  • Sachiyo Murashima
    • 5
  • Shiro Kozuma
    • 6
  1. 1.Department of Gerontological Nursing/Wound Care Management, Graduate School of MedicineThe University of TokyoTokyoJapan
  2. 2.Department of NursingThe University of Tokyo HospitalTokyoJapan
  3. 3.Department of Midwifery and Women’s Health, Graduate School of MedicineThe University of TokyoTokyoJapan
  4. 4.Department of Clinical Trial Design and Management, Translational Research CenterKyoto University HospitalKyotoJapan
  5. 5.Oita University of Nursing and Health ScienceOitaJapan
  6. 6.Department of OB/GYN, Graduate School of MedicineThe University of TokyoTokyoJapan

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