A 19-year-old unmarried female presents 4 days after unprotected intercourse. She is hemodynamically stable and has no history of pelvic infections. She seeks emergency contraception. Which method is most appropriate at this point?

1. A

   Levonorgestrel 1.5 mg orally

2. B

   Copper-T IUD insertion

3. C

   Yuzpe method

4. D

   Mifepristone 200 mg orally

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Explanation

• The Copper-T IUD is the most effective form of emergency contraception, with a failure rate of less than 0.1%.
• It remains highly effective when inserted up to 5 days (120 hours) after unprotected intercourse, making it the ideal choice for a patient presenting at 4 days (96 hours).
• The primary mechanism is preventing fertilization by creating a uterine environment toxic to sperm.
• An added benefit is that it provides highly effective, long-term contraception for up to 10-12 years.
• The patient's history of no pelvic infections makes her a suitable candidate for this method.

Why Other Options Were Wrong

• Option A: Levonorgestrel's effectiveness is optimal within 72 hours and declines significantly by day 4 (96 hours), making it a less reliable option compared to the Copper IUD at this time point.
• Option C: The Yuzpe method is an outdated regimen that is less effective and causes more side effects (like nausea and vomiting) than modern options like Levonorgestrel or the Copper IUD.
• Option D: The Copper IUD is more effective than any hormonal method for EC. While mifepristone is a progesterone modulator, ulipristal acetate is the specific drug in this class more commonly used for EC. The 200 mg dose is also more aligned with medical abortion protocols.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Emergency Contraception Methods and Efficacy Windows as background academic context rather than a clinical decision trigger.
• Nurses have a vital role in providing timely, accurate, and non-judgmental counseling about all emergency contraception options, including their efficacy, side effects, time limits, and costs.
• Patient education must include the fact that EC does not protect against sexually transmitted infections (STIs) and a discussion about ongoing, long-term contraception is essential.
• What if the patient had presented at 48 hours (2 days)? Both Levonorgestrel and the Copper IUD would be highly effective. The choice would then be guided by patient preference for an oral pill versus a long-acting reversible device, cost, and desire for future contraception.

How to Approach the Question

• First, identify the critical clinical detail from the question stem: the time elapsed since unprotected intercourse is 4 days (96 hours).
• Next, recall the different methods of emergency contraception (EC).
• Evaluate each option based on its effective time window. Eliminate options that are no longer effective or have significantly reduced efficacy at 96 hours.
• Compare the remaining viable options based on their efficacy. The goal is to choose the 'most appropriate' method, which usually means the most effective one.
• In this case, the Copper-T IUD is effective up to 120 hours and is the most effective method overall, making it the correct choice.

Concept Tested & Keywords

• Concept Tested: Emergency Contraception Methods and Efficacy Windows
• Stem keywords: emergency contraception, 4 days after, unprotected intercourse
• Lead-in keywords: most appropriate
• Clinical cues: Patient presents at 4 days (96 hours), which is a critical factor in determining the most effective option.

Question ID

QJ3Q8uINYbQ7p9IKnQJHzM

Copy ID

Reference Book

E6 Gynecology Williams p. 137-161

E6 Medicine Harrison 22e Part 2 p. 1058-1060

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1238-1240