A 28-year-old woman with a history of migraine with aura is counselled about contraceptive options. Regarding hormonal contraceptives and their safety profiles, all of the following are CORRECT EXCEPT:

Explanation

## Hormonal Contraceptives in Migraine with Aura: Safety Considerations ### Clinical Context **Key Point:** Migraine with aura is a recognized risk factor for ischemic stroke, and the combination with estrogen-containing contraceptives further elevates this risk. ### Evidence-Based Risk Assessment | Contraceptive Type | Migraine with Aura | Safety Profile | Mechanism | |-------------------|-------------------|---|----------| | **COCs (ethinyl estradiol)** | Contraindicated | **Avoid** | Estrogen increases thrombotic tendency; aura suggests vascular instability [cite:WHO MEC 2015] | | **POPs (levonorgestrel, norethisterone)** | Safe | **Preferred** | No estrogen; minimal systemic absorption; no thrombotic risk | | **Levonorgestrel emergency contraception** | Safe | **Acceptable** | Single high-dose progestin; no estrogen; does not increase VTE/stroke risk | | **Copper IUD** | Safe | **Preferred** | Non-hormonal; gold standard for migraine with aura | ### Detailed Analysis of Each Statement **Statement 1 (COCs contraindicated):** ✓ **CORRECT** - WHO Medical Eligibility Criteria (Category 4 — contraindicated) [cite:WHO MEC 2015] - Mechanism: Estrogen + migraine aura + vascular instability = unacceptable stroke risk **Statement 2 (POPs are safer):** ✓ **CORRECT** - POPs contain no estrogen; progestin-only formulations do not increase thrombotic risk - Ideal alternative for women with migraine with aura who desire hormonal contraception **Statement 3 (Absolute stroke risk ~1 in 100,000/year):** ✗ **INCORRECT** - The absolute risk is **higher than stated** — approximately **1 in 10,000 per year** in women with migraine with aura using COCs [cite:Harrison 21e Ch 340] - This is roughly **4–6 times higher** than the baseline population risk - The quoted figure underestimates the true risk and could lead to inappropriate reassurance **Statement 4 (Levonorgestrel emergency contraception is safe):** ✓ **CORRECT** - Single-dose progestin-only emergency contraception carries no additional thrombotic risk - WHO MEC Category 1 (no restriction) for women with migraine with aura ### Clinical Pearls **High-Yield:** The "aura" is the critical qualifier: - **Migraine WITHOUT aura** → COCs are Category 2 (advantages outweigh risks); generally acceptable - **Migraine WITH aura** → COCs are Category 4 (contraindicated); unacceptable risk **Warning:** Do not confuse absolute risk with relative risk. A relative risk increase of 4–6× is clinically significant even if the absolute number seems small. **Mnemonic: SAFE HORMONES FOR MIGRAINE AURA** — **S**ubdermal implants, **A**cetate progestins (medroxyprogesterone), **F**emale sterilization, **E**mergency levonorgestrel; **H**ormonal IUDs (LNG-IUS), **O**ther POPs, **R**eal copper IUD, **M**inipill, **O**ther non-hormonal, **N**on-estrogen methods, **E**very progestin-only option.