Swift River Simulations 2.0 Maternal Newborn Practice Test

Late decelerations reflect decreased placental blood flow during contractions, indicating uteroplacental insufficiency and fetal hypoxia. The fetal heart rate slows after the peak of a contraction and does not recover until after the contraction ends, showing that the fetus isn’t getting enough oxygen when the uterus tightens. This pattern points to a placental problem rather than a normal variation or cord compression, which would present differently. In labor, this is a red flag for fetal distress and prompts actions to improve placental perfusion and oxygen delivery: reposition the mother to a left lateral stance, stop or reduce uterine stimulation (such as adjusting or stopping oxytocin), secure IV fluids, provide supplemental oxygen, enhance monitoring, and proceed with expedited delivery if the tracing does not improve.