FHR of 156 bpm with minimal variability in a premature infant
Number 3 is correct.
Rationale: A FHR of greater than 160 bpm lasting more than 10 minutes may indicate early fetal hypoxemia, fetal cardiac arrhythmias, infection, or fetal anemia. A normal FHR is from 110 to 160 bpm. Moderate variability is considered a normal finding. Minimal variability may occur with prematurity.