Why Am I Spotting on Birth Control?
Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 21st, 2026.
Spotting on birth control occurs in 30-50% of women, especially during the first 3-6 months of use. Your body needs time to adjust to synthetic hormones, which temporarily disrupts your natural cycle. Breakthrough bleeding happens when hormone levels fluctuate, often due to missed pills, inconsistent timing, or starting a new formulation. Low-dose pills containing less than 35 micrograms of estrogen are more likely to cause spotting. Other factors include certain medications, smoking, or underlying conditions like PCOS. Spotting typically decreases as your body adapts, but persistent bleeding beyond three months warrants medical evaluation to rule out other causes.
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