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Vibroacoustic stimulation in normal term human pregnancy.
A D'Elia1, M Pighetti, F Vanacore
1Department of Obstetrics and Gynaecology, Federico II University, Via S. Pansini n. 5, 80131, Naples, Italy. delia@unina.it
Early Human Development
|June 7, 2005
Summary
Vibroacoustic stimulation (VAS) significantly increased fetal heart rate (FHR) parameters in term fetuses. These responses were largely independent of fetal behavioral states, confirming a notable fetal reaction to VAS.
Area of Science:
- Fetal Physiology
- Maternal-Fetal Medicine
- Neurobehavioral Studies
Background:
- Fetal heart rate (FHR) monitoring is crucial for assessing fetal well-being.
- Understanding fetal responses to external stimuli like vibroacoustic stimulation (VAS) provides insights into fetal development and reactivity.
- Computerized cardiotocography offers precise FHR analysis.
Purpose of the Study:
- To investigate the impact of vibroacoustic stimulation (VAS) on fetal heart rate (FHR) in term human fetuses.
- To evaluate FHR changes using a computerized cardiotocography system.
Main Methods:
- FHR was recorded for 20 minutes before and 30 minutes after VAS in 31 uncomplicated pregnancies (36-42 weeks' gestation).
- The Oxford Sonicaid System 8002 was utilized for computerized FHR measurement.
- Analysis included fetal movements, FHR accelerations, variability episodes, and short-term variations.
Main Results:
- VAS significantly increased fetal movements, FHR accelerations (>10 and 15 bpm), high- and low-variability episodes, and short-term variations.
- Some FHR changes occurred irrespective of fetal behavioral states.
- Specific parameters showed significant changes only in behavioral states 1F and 2F.
Conclusions:
- Computerized cardiotocography confirms a significant fetal response to VAS in normal term pregnancies.
- The immediate fetal response to VAS is generally independent of behavioral states.
- Extended evaluation revealed some state-dependent differences in FHR response to VAS.