A 32-year-old multiparous woman (G4P3L3) from urban Delhi attends a private clinic for contraceptive counselling. She had a spontaneous abortion 2 months ago and is now medically fit. She works as a software engineer with irregular schedules and frequent travel. Her partner uses condoms inconsistently. She has no medical contraindications to any contraceptive method. She is concerned about breakthrough bleeding and wants a method that is 'set and forget'. She is not interested in permanent methods. Based on epidemiological evidence of contraceptive efficacy and her lifestyle, which method would you recommend?