A 28-year-old woman attends the contraception clinic in Delhi seeking oral contraceptive pills (OCPs). She has no contraindications to hormonal contraception. What is the most common reason for discontinuation of OCPs in the first year of use?

Explanation

## Most Common Reason for OCP Discontinuation **Key Point:** Breakthrough bleeding (BTB) and spotting are the single most common reasons for discontinuation of OCPs in the first year of use, accounting for approximately 10–20% of early discontinuations. ### Why Breakthrough Bleeding Occurs Breakthrough bleeding is most frequent in the first 3 months of OCP use and occurs due to: 1. **Endometrial suppression** — Low-dose progestins in modern OCPs cause endometrial atrophy and reduced endometrial thickness 2. **Insufficient endometrial stability** — The endometrium becomes fragile and prone to spontaneous shedding 3. **Estrogen dose insufficiency** — Lower estrogen doses in modern formulations provide less endometrial support ### Natural Resolution - **High-Yield:** BTB typically resolves spontaneously by cycle 3–6 in 80% of users - Reassurance and continuation are the first-line approach - If persistent, switching to a pill with slightly higher estrogen content or different progestin may help ### Comparative Incidence of Side Effects | Side Effect | Incidence (%) | Timing | Reversibility | |---|---|---|---| | **Breakthrough bleeding** | 10–20 | Cycles 1–3 | Spontaneous in 80% | | Nausea | 5–10 | First 1–2 cycles | Usually resolves | | Weight gain | 2–5 | Variable | Modest (1–2 kg) | | Headaches | 3–8 | Variable | May persist | **Clinical Pearl:** The frequency of BTB is inversely related to estrogen dose. Modern ultra-low-dose pills (20 µg ethinyl estradiol) have higher BTB rates than standard-dose pills (30–35 µg). **Tip:** When counselling patients starting OCPs, explicitly warn about BTB in the first 3 months and emphasize that it usually resolves without intervention — this reduces premature discontinuation due to alarm.