Question

Definition of FHR reactivity if < 33 weeks

a) 1 acceleration in 20 minutes
b) 2 accelerations in 30 minutes
c) 3 accelerations in 40 minutes
d) 4 accelerations in 50 minutes

Answer 1

Fetal heart rate (FHR) reactivity before 33 weeks of gestation is defined as having 2 accelerations in 30 minutes during a Non-Stress Test, indicating a healthy fetus.

Step-by-step explanation:

The definition of fetal heart rate (FHR) reactivity before 33 weeks of gestation is b) 2 accelerations in 30 minutes. FHR reactivity is an important part of the Non-Stress Test (NST), which is a prenatal test used to check on a baby's health during pregnancy. The NST measures how the baby's heart rate responds to movements. Typically, an acceleration is defined as an increase in the fetal heart rate of at least 15 beats per minute above baseline, lasting for at least 15 seconds. The reactivity is an indication of a healthy and well-oxygenated fetus.