Q. A 22-year-old African American woman visits her gynecologist for contraception. She says that she has been sexually active with her boyfriend for the past 2 years and irregularly uses condoms. She also has prolonged menstrual bleeding for the past 4 months. Her last menstrual period was 3 weeks ago and she had continuous bleeding for 10 days. She is not on any medication. She attained menarche at the age of 14 years. Her temperature is 98.6°F (37°C), pulse is 88/min, blood pressure is 110/70 mmHg, and respirations are 14/min. BMI is 22 kg/m2. Physical exam shows a firm, irregular, non-tender, and mobile mass arising from the pelvis, corresponding in size to a pregnant uterus of 12 weeks gestation. A pregnancy test is negative. Transvaginal ultrasonography shows multiple small intramucosal leiomyomas distorting the endometrial cavity. Which of the following contraceptive methods is contraindicated in this patient?