ScienceContemporaryglobalhigh confidence

The source advises using backup contraception until a combination birth-control pill has been taken for 7 consecutive days after a missed dose.

Notes on verification

Directly confirmed by the WebMD source's own text and independently corroborated by CDC, Planned Parenthood, Cornell Health, and other clinical guidance sources. [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.95 clusters=3 claim_tier=notable | framework convergence=partial on CDC/U.S. SPR and FSRH clinical guidelines on missed combined oral contraceptive pills (upstreams: CDC U.S. Selected Practice Recommendations for Contraceptive Use (2024), Faculty of Sexual & Reproductive Healthcare (FSRH) guidance) — publishers independent, evidence may not be | kind=attributed eligibility=high]

Sources