This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Natural Methods, Barrier Methods, IUDs, OCPs, Subject name: Social & Preventive Medicine
[{'content': 'The highest incidence of ectopic pregnancy amongst contraceptive users is observed with: \nSelect and explain. \nA. Combined contraceptive pills, B. Copper T intrauterine contraceptive device, C. Progestase intrauterine device, D. Levonorgestrel intrauterine system', 'role': 'user'}, {'content': 'Answer: C \nExplanation: - There is a slight increase in propoion of ectopic pregnancy post-failure of IUCD. The failure is highest with progesterone IUD. Progestase intrauterine device: - Rate of progesteron release = 65 mcg/day - Total progesteron content = 38mg - Shelf life = 1 to yrs - MC side effect is bleeding - 2nd MC side effect - pain', 'role': 'assistant'}]