Your patient is the 24-year-old female driver of a vehicle in a motor vehicle collision. She rear-ended a vehicle stopped at a traffic light at about 25 miles per hour. She was restrained, and the front airbags deployed. She is 32 weeks pregnant. She is anxious because she has not felt the baby move since the impact, and she is complaining of constant pain on the left side of her abdomen

Palpation of the abdomen reveals unusual firmness over the left side of the abdomen. The patient has a pulse of 116, a blood pressure of 92/60, and respirations of 28. Her skin is cool but dry, and she has no other complaints. For which of the following should you have the highest index of suspicion?

A) Placenta previa
B) Placenta accreta
C) Abruptio placentae
D) Stress-induced onset of labor

C