Check firstCheck with your care teamTest or decision

Screening tests versus diagnostic tests

A screening test estimates the chance of a condition; it does not diagnose it. A diagnostic test answers a narrower question but may involve a procedure.

Direct guidance

What to know or do

Before testing, ask what it can and cannot show, whether a result may be uncertain, what follow-up is available and how the result could affect your choices.

What changes the answer

  • Whether this is screening, diagnosis, monitoring, treatment or birth planning
  • Pregnancy week, previous results and what the result could change
  • Benefits, limits, alternatives, follow-up and the time available to decide

Check with your care team

When to get individual help

Check the exact item or situation with a doctor, midwife, pharmacist or relevant clinician; the name of a broad category is not enough for a personal decision.