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Change in urethral sphincter neuromuscular function during pregnancy persists after delivery.

Publication ,  Journal Article
Weidner, AC; South, MMT; Sanders, DB; Stinnett, SS
Published in: Am J Obstet Gynecol
November 2009

OBJECTIVE: The purpose of this study was to assess the effect of pregnancy and first vaginal delivery on urethral striated sphincter neuromuscular function. STUDY DESIGN: Quantitative electromyographic (EMG) interference pattern analysis of the urethral sphincter of 23 nulligravidas and 31 third trimester primigravidas allowed comparison of mean motor unit parameters before term vaginal delivery and postpartum. RESULTS: Mean electromyographic interference pattern parameters in the primigravidas were significantly lower than nulligravidas even antepartum, with decreased turns, lower amplitude, and less activity. The only significant change at 6 months' postpartum was further decline in number of turns resulting in a further decrease in turns:amplitude. All other electromyographic abnormalities persisted at 6 months' postpartum and remained abnormal compared to the nulligravidas. CONCLUSION: Urethral sphincter neuromuscular function changed significantly during pregnancy and these changes persisted postpartum. Lack of recovery 6 months' postpartum suggests a physiologic impact of pregnancy itself on future risk of urinary incontinence.

Duke Scholars

Published In

Am J Obstet Gynecol

DOI

EISSN

1097-6868

Publication Date

November 2009

Volume

201

Issue

5

Start / End Page

529.e1 / 529.e6

Location

United States

Related Subject Headings

  • Urethra
  • Time Factors
  • Pregnancy
  • Obstetrics & Reproductive Medicine
  • Humans
  • Female
  • Electromyography
  • Delivery, Obstetric
  • Adult
  • 3215 Reproductive medicine
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Weidner, A. C., South, M. M. T., Sanders, D. B., & Stinnett, S. S. (2009). Change in urethral sphincter neuromuscular function during pregnancy persists after delivery. Am J Obstet Gynecol, 201(5), 529.e1-529.e6. https://doi.org/10.1016/j.ajog.2009.07.022
Weidner, Alison C., Mary M. T. South, Donald B. Sanders, and Sandra S. Stinnett. “Change in urethral sphincter neuromuscular function during pregnancy persists after delivery.Am J Obstet Gynecol 201, no. 5 (November 2009): 529.e1-529.e6. https://doi.org/10.1016/j.ajog.2009.07.022.
Weidner AC, South MMT, Sanders DB, Stinnett SS. Change in urethral sphincter neuromuscular function during pregnancy persists after delivery. Am J Obstet Gynecol. 2009 Nov;201(5):529.e1-529.e6.
Weidner, Alison C., et al. “Change in urethral sphincter neuromuscular function during pregnancy persists after delivery.Am J Obstet Gynecol, vol. 201, no. 5, Nov. 2009, pp. 529.e1-529.e6. Pubmed, doi:10.1016/j.ajog.2009.07.022.
Weidner AC, South MMT, Sanders DB, Stinnett SS. Change in urethral sphincter neuromuscular function during pregnancy persists after delivery. Am J Obstet Gynecol. 2009 Nov;201(5):529.e1-529.e6.
Journal cover image

Published In

Am J Obstet Gynecol

DOI

EISSN

1097-6868

Publication Date

November 2009

Volume

201

Issue

5

Start / End Page

529.e1 / 529.e6

Location

United States

Related Subject Headings

  • Urethra
  • Time Factors
  • Pregnancy
  • Obstetrics & Reproductive Medicine
  • Humans
  • Female
  • Electromyography
  • Delivery, Obstetric
  • Adult
  • 3215 Reproductive medicine