Home pregnancy tests detect the pregnancy hormone hCG in urine to show whether you might be pregnant.
If only the control line appears, it usually means the test is negative and hCG was not detected.
When you see two lines — even if one is faint — it usually indicates a positive result and presence of hCG.
A faint second line may appear early in pregnancy when hCG levels are still low but rising.
Testing again after a couple of days often gives a stronger second line as hCG increases.
A blood test at your doctor’s office can confirm pregnancy more accurately than a home kit.
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