IMR Press / CEOG / Volume 43 / Issue 4 / DOI: 10.12891/ceog3040.2016

Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 46 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Open Access Original Research
Electromyographic activity of the pelvic floor muscles in the third trimester: comparison between primigravidae and secundigravidae
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1 Department of Physiotherapy, Federal University of Sergipe – UFS, Lagarto, SE
2 Department of Physiotherapy, Federal University of Sergipe – UFS, University Hospital, Aracaju, SE
3 Department of Physical Therapy, Federal University of São Carlos (UFSCar), São Carlos, SP (Brazil)
Clin. Exp. Obstet. Gynecol. 2016, 43(4), 565–568;
Published: 10 August 2016

Objective: The objective was to compare the electromyographic activity of pelvic floor muscle (PFM) on third semester between primigravidae and secundigravidae who had previous vaginal delivery. Design: Cross-sectional observational study. Sample: Nineteen primigravidae and 21 secundigravidae between 34th and 36th gestational weeks were evaluated. Materials and Methods: Data collection consisted in assessing the PFMs activity by surface electromyography. Main outcome measures: The variables related to electromyographic assessment such peak and average on the rest, maximal voluntary contraction, and sustained contraction. Results: There were no differences on electromyographic activity of PFMs between primigravidae and secondigravidae. However, a significant increase in body mass index and a negative correlation of the newborn weight with the peak value of electromyographic signal during maximal voluntary contraction were observed. Conclusions: The factors that can change the electromyographic activity pattern during pregnancy can be related to maternal body mass increased and newborn weight.
Pelvic floor
Urinary incontinence
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