engleski

Placental site does not change background uterine electromyographic activity in mid trimester pregnancy

Aim: This study is performed in order to assess the changes of electromyographic (EMG) activity of the uterus above the placental implantation site in mid trimester pregnancy. Methods: In this prospective study 156 unselected, nulliparous asymptomatic women with singleton pregnancy underwent transabdominal uterine electromyography. Uterine electrical activity was recorded using bipolar electrodes placed on the abdominal surface for 20 minutes. Outcome measures were: number of action potentials (AP), median frequency (MF) and median amplitude (MA) of AP regarding to the placental implantation site. Results: Among 156 recruited pregnant women the placenta was positioned anteriorly in 90 women (anterior placenta group- APG) and posteriorly in 66 women (posterior placenta group- PPG). AP are detected at 42 women (APG 28/90 versus PPG 14/66). This difference was not statistically significant (p= 0.167, Student t - test). The other analyzed parameters: MF (left and right uterine side) and MA (left and right uterine side) did not show any statistical significant difference between two groups. Conclusion: Placental site does not change background uterine electromyographic activity in mid trimester pregnancy.

transabdominal electromyography - EMG; placenta; implantation site; uterine electrical activity; action potentials; mid pregnancy

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