Acknowledgments
The authors gratefully acknowledge the assistance of D. Levitan and Y. Kimelfeld during the survey design.
Conflicts of interest statement
The study was conducted as part of a research project by Fetal Precision LLC. The company has been since dissolved and the findings have been open sourced. M. G. Frasch has patents on aECG (WO2018160890) and EEG technologies for fetal monitoring (US9215999). The authors declare that the research was conducted in the absence of any other commercial or financial relationships that could be construed as a potential conflict of interest.