MP NHM CHO-2024 (Shift-1)
Obstetrics & Gynaecology
Easy
______ is a hormonal contraceptive method involving the injection of progestin into the muscle every three moths to prevent pregnancy.
Appeared in: MP NHM CHO-2024 (Shift-1)
Explanation
- Injectable contraceptives, such as Depot Medroxyprogesterone Acetate (DMPA), are administered as an injection every 3 months (90 days).
- This method primarily uses progestin to prevent pregnancy, matching the description in the question.
- The mechanism involves inhibiting ovulation, thickening cervical mucus, and creating an endometrium unfavorable for implantation.
- Its effectiveness is very high, with typical use failure rates being low when injections are received on schedule.
Why Other Options Were Wrong
- Option A: The vaginal ring is a device inserted into the vagina for a 3-week period, not an injection given every three months. It also typically contains both estrogen and progestin.
- Option C: The contraceptive patch is a transdermal system applied to the skin and changed weekly. It is not an intramuscular injection.
- Option D: The implantable rod is a long-acting contraceptive that is surgically inserted under the skin of the arm and lasts for up to 3 years. It is not an injection administered every three months.
Related Visual
- Visual 1: Infographic: A comparative chart showing different hormonal contraceptive methods, their administration routes (injection, patch, ring, implant), frequency of use, and hormones involved.
- Visual 2: Illustration: A diagram showing the intramuscular injection site for DMPA (e.g., deltoid or gluteal muscle).
- Visual 3: Image: A photo gallery displaying the physical appearance of a contraceptive injection vial, a vaginal ring, a contraceptive patch, and an implantable rod for visual differentiation.
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of hormonal contraceptive methods based on administration route and frequency as background academic context rather than a clinical decision trigger.
- Patient counseling is crucial for injectable contraceptives. Nurses must inform patients about potential side effects like irregular bleeding (especially in the first few months), weight gain, and a possible delay in the return to fertility after discontinuation.
- A key consideration for long-term use (greater than 2 years) of DMPA is the potential for decreased bone mineral density. Nurses should discuss this risk, especially with adolescent patients, and emphasize the importance of calcium and vitamin D intake.
- What if a patient wants a long-acting, progestin-only method but is needle-phobic? In this case, the nurse could discuss the implantable rod or a progestin-only IUD (intrauterine device) as suitable alternatives that do not require regular injections.
How to Approach the Question
- First, carefully read the question stem and identify the key defining features of the contraceptive method being described.
- The keywords are 'injection', 'progestin', and 'every three months'.
- Next, evaluate each option against these three criteria.
- Option A (Vaginal ring) is incorrect because it's not an injection and has a different usage cycle.
- Option C (Contraceptive patch) is incorrect as it's a patch, not an injection, and is used weekly.
- Option D (Implantable rod) is incorrect because it's an implant that lasts for years, not a three-monthly injection.
Concept Tested & Keywords
- Concept Tested: Identification of hormonal contraceptive methods based on administration route and frequency.
- Stem keywords: hormonal contraceptive, injection, progestin, every three months
- Lead-in keywords: is a
- Clinical cues: Route of administration: injection into the muscle
- Clinical cues: Frequency: every three months
Question ID
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Practise the full MP NHM CHO-2024 (Shift-1)
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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