Early pregnancy test false negative

Patient's question:

No

Doctor's answer:

Result Determination:
1. Negative: Only the control line appears, indicating no pregnancy.
2. Weak Positive: Both the control line and test line are colored, but the test line is lighter than the control line, indicating possible pregnancy. Re-test with morning urine the next day.
3. Positive: Both the control line and test line are colored, and the test line is clearly visible, indicating pregnancy.
4. Strong Positive: Both the control line and test line are colored, but the test line is darker than the control line, indicating pregnancy for some time.
5. Invalid: No colored lines appear, indicating the test is invalid or failed.