1. Department of Obstetrics and Gynaecology, Máxima Medical Centre, Veldhoven, The Netherlands
2. Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
3. Eindhoven MedTech Innovation Center (e/MTIC), Eindhoven, The Netherlands
4. University MC Utrecht, Utrecht, The Netherlands
5. Faculty of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
6. Department of Obstetrics and Gynaecology, The Maternal and Child Hospital of Shijiazhuang, Shijiazhuang, Hebei Province, P.R. China
7. Department of Obstetrics and Gynaecology, Catharina Hospital, Eindhoven, The Netherlands