A nurse assisting on a labor unit is collecting data about the fetal heart rate pattern of a client in labor. Which of the following findings should the nurse classify as nonreassuring fetal heart rate patterns? (Select All that Apply.)

Choice A rationale Variable decelerations are abrupt, unpredictable decreases in fetal heart rate, often V, W, or U shaped. They are caused by umbilical cord compression, which reduces umbilical blood flow, leading to hypoxia and acidemia. This compromises fetal oxygenation and can indicate fetal distress requiring intervention to optimize fetal well-being. Choice B rationale Early decelerations are symmetrical, gradual decreases in fetal heart rate that mirror uterine contractions. They are caused by head compression during labor, stimulating the vagus nerve and slowing the heart rate. This is generally considered a benign finding and indicates normal fetal response to uterine contractions. Choice C rationale Decreased fetal heart rate (FHR) variability refers to a reduction in the normal fluctuations of the FHR. This indicates reduced central nervous system (CNS) oxygenation and autonomic nervous system activity, often due to fetal hypoxia, acidemia, or CNS depressant medications. Sustained decreased variability is a significant nonreassuring sign. Choice D rationale Absent accelerations mean the fetal heart rate does not spontaneously increase by 15 beats per minute for at least 15 seconds. Fetal accelerations indicate a healthy, oxygenated fetal central nervous system and are a sign of fetal well-being. Their absence suggests potential fetal hypoxemia or acidosis.