The chaos theory for differentiating fetal biomagnetic brain activity in normal and pre-eclamptic pregnancies

In this study we investigated the fetal biomagnetic brain activity obtained in normal and pre-eclamptic pregnancies using a non-linear analysis. Measurements were performed using a single channel biomagnetometer superconducting quantum interference device (SQUID) in an electrically shielded room of low magnetic noise. Using the application of non-linear analysis and dimensionality calculations we have observed a clear saturation for the dimension of the fetal biomagnetic brain activity from pre-eclamptic pregnancies and no saturation for fetal brain activity in normal pregnancies. Thus, the biomagnetic measurements with the SQUID and the application of non-linear analysis, is a promising procedure in assessing and differentiating fetal biomagnetic brain activity in normal and pre-eclamptic pregnancies.