Simulation modeling demonstrates that while fetal magnetocardiogram amplitude remains relatively stable despite changes in the conductive medium during gestation, the waveform itself is altered.
FMCG amplitude may support fetal monitoring despite gestational changes; leaves open waveform interpretation for clinical validation.
During gestation the abdominally recorded fetal ECG (FECG) changes as a result of changes in the conductive medium. In particular, a minimum occurs in the FECG amplitude around 30 weeks of gestation. Based on the results of an extensive FECG study, the effect of these changes on the fetal MCG are simulated. It is shown that the FMCG amplitude is not greatly affected by the changes in the conductive medium. The FMCG waveform, however, is.
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Oostendorp et al. (1991) studied this question.
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