A copper IUD is placed for emergency contraception in a 24-year-old woman who had unprotected intercourse 4 days ago. She subsequently requests long-term contraception and wants to keep the device. What is the minimum follow-up period before confirming successful emergency contraception with copper IUD?

• A A positive pregnancy test 7 days after insertion
• B Ultrasound at 72 hours to confirm placement
• C hCG measurement at 2 weeks post-insertion
• D Onset of next menstrual period ✓

Explanation

Successful emergency contraception with copper IUD is confirmed by the onset of the next expected menstrual period. This confirms that implantation has not occurred. Pregnancy tests are not required unless the period is delayed. Ultrasound confirms IUD position, not contraceptive efficacy. The copper IUD, placed within 5 days of unprotected intercourse, has >99% efficacy as emergency contraception and can remain in situ for ongoing long-term contraception.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

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Written and medically reviewed by the StethoPrep medical team.