[N-clex] NST(non-stress test) : fetal wellbeing

- FHR(ultrasound transidure)

- fetal movemet(tocodynamometer)

- SFP

- reactive : 정상(20분간, 15회, 15sec이상, 2회↑) / non reactive 비정상 → CST

CST(FHR-contraction)

- LD(후기하강) O : abnormal / X : normal