Q. A 24-year-old, nulliparous obese woman comes to her gynecologist for emergency contraception because she is worried that last night while having intercourse with her boyfriend, the condom broke. She feels that she is not prepared to care for a child. She has been sexually active with her boyfriend for the past 4 years and uses condoms consistently. Her menstrual history shows irregular cycles with varied amounts of blood. Her last menstrual period was 2 weeks ago. She is not on any medication. She and her partner were recently tested for sexually transmitted infections and the results were negative. Her temperature is 98.6° (37°C), pulse is 82/min, blood pressure is 110/80 mmHg, and respirations are 14/min. BMI is 31 kg/m2. Physical examination is unremarkable. Which of the following is the highly effective contraception for this patient?