A nurse is assessing a 30-year-old patient who is in labor….

A nurse is assessing a 30-year-old patient who is in labor. The patient is 6 cm dilated, experiencing strong contractions every 2-3 minutes that last about 60 seconds. She is increasingly anxious and reports significant back pain. The nurse observes that the patient is using breathing techniques and has expressed a desire for pain relief. Based on this assessment, which stage of labor is the patient currently in?