Understanding when to test after potential exposure is crucial for accurate results. Learn about detection timelines for each infection.
The window period is the time between potential exposure to an infection and when a test can reliably detect it. Testing too early may result in a false negative, even if you're infected.
Earliest a test might detect infection, but accuracy is lower
Best balance of accuracy and early detection
Test is highly accurate; negative result reliably rules out infection
| Test | Minimum | Optimal | Conclusive | Notes |
|---|---|---|---|---|
| Chlamydia Test | 1-5 days | 7-14 days | 14 days | NAAT testing is highly sensitive and can detect early infections |
| Gonorrhea Test | 2-6 days | 7-14 days | 14 days | Similar to chlamydia - NAAT provides early detection |
| Syphilis Test | 14-21 days | 21-42 days | 90 days | Blood antibody tests need time to develop after exposure |
| HIV (4th Gen) | 18 days | 45 days | 90 days | Detects p24 antigen and antibodies for earlier detection |
| HIV RNA Early | 9-11 days | 14-28 days | 28 days | Most sensitive option for very recent exposure |
| Herpes 1 & 2 | 21 days | 42 days | 84 days | IgG antibodies take time to develop after initial infection |
| Hepatitis B | 28 days | 60 days | 90 days | Surface antigen or antibody tests available |
| Hepatitis C | 28 days | 42 days | 90 days | Antibody testing requires window period consideration |
| Trichomoniasis | 5-7 days | 14 days | 21 days | NAAT testing is more accurate than traditional microscopy |
If you're very concerned about recent exposure, consider:
Most bacterial infections can be detected:
All tests are highly accurate at this point:
If you're unsure about timing, it's generally better to test now and retest later than to wait. Many people benefit from testing at 2 weeks and again at 6-8 weeks for complete peace of mind.
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