A 30-year-old woman at 34 weeks of gestation comes to the cl…
A 30-year-old woman at 34 weeks of gestation comes to the clinic for a routine prenatal visit. She complains of lower back pain that worsens by the end of the day and when she stands for prolonged periods. She has no fever, urinary symptoms, or trauma. The nurse observes that she has a noticeable sway in her posture. Which of the following is the most likely cause of her discomfort?