Which contraceptive method is most likely to cause hirsutism (excessive hair growth) as a side effect?

NORCET 7 Prelims -2024

Obstetrics & Gynecology

Hard

Appeared in: NORCET 7 Prelims -2024

Explanation

Hirsutism is an androgenic side effect, meaning it is related to male hormone activity.
Progesterone-only pills (POPs) often contain synthetic progestins (e.g., norethindrone) that possess androgenic properties.
Unlike combined pills, POPs lack estrogen. Estrogen normally helps to counteract androgenic effects by increasing sex hormone-binding globulin (SHBG), which binds and inactivates free testosterone.
Without the balancing effect of estrogen, the androgenic properties of the progestin in POPs are unopposed, making side effects like hirsutism more likely.

Option B: Copper IUDs are non-hormonal and have no effect on hair growth. Hormonal IUDs release progestin primarily locally within the uterus, resulting in very low systemic absorption and making systemic side effects like hirsutism rare.
Option C: Depo-Provera contains medroxyprogesterone acetate. While this is a progestin-only method, this specific progestin has lower androgenic activity compared to the older, testosterone-derived progestins often used in progesterone-only pills.
Option D: These contraceptives contain estrogen, which increases the production of SHBG. SHBG binds to free testosterone, reducing its biological activity. Therefore, these pills are often prescribed to treat hirsutism, not cause it.

Visual 1: Infographic - A diagram comparing how combined oral contraceptives (COCs) and progesterone-only pills (POPs) affect androgen levels. The COC side shows estrogen increasing SHBG, which binds testosterone. The POP side shows the unopposed androgenic effect of the progestin, leading to potential side effects like hirsutism.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Side effects of hormonal contraceptives, specifically androgenic effects like hirsutism as background academic context rather than a clinical decision trigger.
Patient counseling is crucial for managing expectations regarding potential side effects of hormonal contraceptives, including cosmetic changes like acne or hair growth.
When recommending a contraceptive, a nurse should consider the patient's complete health history, including pre-existing conditions like Polycystic Ovary Syndrome (PCOS), which is associated with hyperandrogenism.
What if? If a patient already suffering from hirsutism requires contraception, a combined oral contraceptive containing estrogen and a low-androgenic or anti-androgenic progestin would be the preferred choice to manage both needs simultaneously.

How to Approach the Question

First, identify the key term 'hirsutism' and understand that it is an androgenic (male-hormone-related) side effect.
Next, analyze each contraceptive option based on its hormonal composition (progestin-only vs. combined with estrogen).
Recall the role of estrogen: it generally counteracts androgenic effects by increasing Sex Hormone-Binding Globulin (SHBG), which reduces active testosterone.
This eliminates oral contraceptives with estrogen, as they would improve, not cause, hirsutism.
Compare the remaining progestin-only methods. Differentiate between systemic methods (pills, injections) and local methods (hormonal IUDs). Local methods have fewer systemic side effects.
Finally, compare the systemic progestin-only methods (pills vs. injection). Recognize that different progestins have varying levels of androgenic activity. Pills often contain older, more androgenic progestins, making them the most likely cause of unopposed androgenic side effects.

Concept Tested & Keywords

Concept Tested: Side effects of hormonal contraceptives, specifically androgenic effects like hirsutism.
Stem keywords: contraceptive method, hirsutism, excessive hair growth, side effect
Lead-in keywords: most likely

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