Q. A 24-year-old woman comes to the emergency department for acute severe lower abdominal pain that started an hour ago. She says that she came to the office as usual and she suddenly developed abdominal pain associated with nausea. She denies fever, abnormal vaginal bleeding/discharge, or urinary disturbances. She is sexually active with her boyfriend and uses condoms regularly. Her last menstrual period was 1 week ago. Her temperature is 98.6°F (37°C), pulse is 88/min, blood pressure is 110/70 mmHg, and respirations are 14/min. Physical examination shows abdominal tenderness localized to the right lower quadrant without guarding or rigidity. Pelvic examination shows a right-sided tender adnexal mass. A pregnancy test is negative. Transvaginal ultrasound shows an enlarged 8 cm right ovary with a heterogenous appearance, located anterior to the uterus. What is the best next step in this patient’s management?