DSSSB -28 August 2019 (Shift-2)
Obstetrics & Gynaecology
Easy

What is the recommended period for taking a post-coital contraceptive pill after unprotected intercourse?

Appeared in: DSSSB -28 August 2019 (Shift-2)

Explanation

  • The standard recommendation for the most common post-coital pill, which contains levonorgestrel, is to take it within 72 hours (3 days) of unprotected intercourse.
  • This type of emergency contraception works primarily by preventing or delaying ovulation.
  • Its effectiveness is highest when taken as soon as possible after intercourse and declines with each passing day.
  • While other methods have a longer window, the 3-day period is the established guideline for the most widely available emergency contraceptive pill.

Why Other Options Were Wrong

  • Option A: A week (7 days) is too long for any emergency contraceptive pill to be effective. This timeframe is outside the recommended window for both levonorgestrel and ulipristal acetate.
  • Option B: While some emergency contraceptive pills (like ulipristal acetate) are effective up to 5 days (120 hours), the most common levonorgestrel pill's primary window of efficacy is 3 days (72 hours). Therefore, 4 days is beyond the standard recommendation.
  • Option D: This is the maximum time frame for the effectiveness of ulipristal acetate pills and for the insertion of a copper IUD as emergency contraception. However, it is not the standard recommended period for the most common post-coital (levonorgestrel) pill.

Related Visual

Visual explanation — Related Visual
Clinical Relevance
  • Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Emergency Contraception Timeframes as background academic context rather than a clinical decision trigger.
  • Nurses play a critical role in providing timely, non-judgmental, and accurate information about emergency contraception (EC) to prevent unintended pregnancies.
  • Counseling should include not just the time window but also potential side effects, the need for a follow-up pregnancy test if menses are delayed, and the fact that EC does not protect against STIs.
  • It is an important opportunity to discuss and initiate a reliable, long-term contraceptive method to reduce future reliance on emergency measures.
How to Approach the Question
  • First, identify the core of the question. It asks for the 'recommended period' for a 'post-coital contraceptive pill'.
  • Recognize that 'post-coital pill' or 'morning-after pill' most commonly refers to the levonorgestrel-based emergency contraceptive.
  • Recall the standard timeframes for different emergency contraception methods.
  • Evaluate the options based on the standard recommendation for levonorgestrel. The established window is within 72 hours.
  • Convert 72 hours to days (72 / 24 = 3 days).
  • Select the option that matches this timeframe, which is 'Within 3 days'.
Concept Tested & Keywords
  • Concept Tested: Emergency Contraception Timeframes
  • Stem keywords: post-coital contraceptive pill, unprotected intercourse, recommended period
  • Lead-in keywords: What is
  • Negative lead-in flag: false

Question ID

QgjA-taqco9S4aIBYqhw9E

Reference Book

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) p. 194-196

E6 Gynecology Williams p. 137-161

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

Practise the full DSSSB -28 August 2019 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.

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