A woman using a copper intrauterine device (CuT 380A) for emergency contraception presents 4 days after unprotected intercourse. What is the MAXIMUM number of days post-coitus within which an IUD can be inserted for emergency contraception?
- A 5 days ✓
- B 3 days
- C 7 days
- D 10 days
Correct answer: A. 5 days
Explanation
Copper IUDs can be inserted within 5 days (120 hours) of unprotected intercourse for emergency contraception with an efficacy of over 99% — making it the most effective form of emergency contraception. The mechanism is primarily by preventing implantation of a fertilised ovum and also through spermicidal effects of copper ions. Unlike hormonal emergency contraception, the IUD can then be retained for ongoing long-term contraception.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.