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High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo
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Published on: November 8, 2018

Maternal perception of sound-provoked fetal movements in low-risk pregnancies during the third trimester

M Nyman1, M Westgren

  • 1Department of Obstetrics and Gynaecology, Danderyd Hospital, Sweden.

British Journal of Obstetrics and Gynaecology
|May 1, 1989
PubMed

Maternal perception of fetal movements after vibroacoustic stimulation (Servox) was studied longitudinally on 456 occasions in 90 low-risk pregnancies after 28 weeks gestation until delivery. A positive response to sound stimulation, recorded as a fetal movement by the mother, occurred on 444 (97%) occasions. Of the 12 negative responses eight occurred before 33 weeks showing a positive correlation with decreasing maturity. All the pregnancies had good outcomes. The low rate of false-positive tests (3%) adds support to the suggestion that this rapid test could play a role in the assessment of fetal well-being.

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