Why is my pregnancy test line faint?
Last updated September 3, 2026.
A faint line inside the read window is positive - line intensity tracks hCG, and early pregnancy simply has less of it, so faint usually means early. Per the NHS, a positive however faint is almost certainly correct. The confusers: an evaporation line (colorless, appears after the window closes - not a result) and a chemical pregnancy (a real positive that fades instead of darkening). Confirm by retesting in 48 hours with first-morning urine - the line should darken as hCG doubles. One-sided severe pain or dizziness with a positive test: ectopic warning, same-day care.
What to do
- Count a colored line in the window as positive. Faint is fine.
- Ignore lines that appear later. Evaporation marks are not results.
- Retest in 48 hours. Darker means progressing; fading suggests a chemical pregnancy.
- Escalate pain or dizziness with a positive. The ectopic red flags are same-day.
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