Maternal D alloimmunization (prevention) Quiz: Ace Your Exams

A previously healthy 27-year-old woman, G2P0010, at 30 weeks estimated gestational age (EGA), presents to a local emergency department (ED) after being involved in a motor vehicle accident while she is out of state. She has abdominal pain and mild contractions but no vaginal bleeding or loss of fluid. She has been receiving regular prenatal care back home and has undergone all appropriate routine tests and recommended interventions; her last prenatal appointment was 2 weeks ago. Her history is notable for one prior spontaneous early pregnancy loss at 8 weeks EGA. Temperature is 36.7°C (98.1°F), pulse is 94/min, respirations are 18/min, and blood pressure is 122/78 mmHg. On exam, the abdomen is mildly tender to palpation, and ecchymosis is noted in the location of a lap belt. A type and screen in the ED shows her blood type is B-negative with a positive antibody screen. Which of the following is the most appropriate next step based on the history provided?