Self-healing structural composites with electromagnetic functionality

A portable apparatus for the non-invasive, simultaneous, self-testing of fetal and maternal signals which comprises: a user display means to indicate that the device is operational; an ultrasonic means connected to the device for detecting fetal heart rate; a detection means connected to the device for detecting maternal input signals; signal processing means including a logarithmic amplification means for simultaneously processing fetal heart rate and maternal input signals; and a communication linking mean for the simultaneous transmission of fetal heart rate and maternal input data to a remote output device.