A nurse is assisting in the care of a client who is at 3 weeks of gestation. The client presents to the Labor and Delivery Unit in the early phase of active labor with contractions occurring every 3 to 4 minutes. An 18-gauge needle is inserted in the left hand and oxytocin infusion is initiated. An internal examination reveals a left occiput anterior (LOA) vertex, 4 cm dilation, complete effacement, and decelerations noted in the fetal heart rate (FHR) which decreases to 100/min with contractions, lasts 10 seconds, and returns to baseline within 20 seconds. What condition is the client most likely experiencing, what are 2 actions the nurse should take to address that condition, and what are 2 parameters the nurse should monitor to assess the client's progress?