- L Literature on health care system, legislation in the country, continuous wave Doppler ultrasound and Umbiflow™; CC Clinician Consultation, CT technical consultation, UM user survey midwives and nurses, UC user survey clinician, P patient, CW continuous wave, PW pulse wave, DUS Doppler ultrasound, U umbiflow, CHC Community Health Centres, ANC antenatal care, CHW community health worker, SAMRC South African Medical Research Council, CSIR Council of Scientific and Industrial Research