A 36-year-old G3 P1 pregnant woman at 34 weeks gestation presents with sudden-onset vaginal bleeding, severe abdominal pain, and uterine tenderness. Her history is significant for preeclampsia in her first pregnancy and chronic hypertension. She smokes one pack of cigarettes a day and uses cocaine occasionally. On examination, the uterus is firm and rigid on examination, and fetal heart rate monitoring shows distress. You suspect placental abruption in this patient. Which of the following is a risk factor for this disorder in this patient?
