How does integrated prenatal screening work?

What does the evidence say about integrated prenatal screening?

1. Integrated screening uses results from two stages of pregnancy together. It is a planned testing pathway, not simply two unrelated screening reports. Ask the practice how the laboratory will connect your first and second samples, especially if you move or change prenatal clinicians. 1
2. A combined first- and second-trimester approach may not provide its final risk estimate until the second trimester. That timing can matter to someone who wants information earlier. Discuss timing alongside accuracy, access, and which conditions are included before the first draw. 2
3. Blood markers and an ultrasound can signal a higher chance of selected conditions, but a screen does not give a definite fetal genetic result. A screen-positive report still needs a conversation about what is known and what further testing could clarify. 3
4. NIPT is another screening approach and can begin earlier than the final integrated result. It is not automatically an extra test to add to every existing screening plan. Tell the clinician what has already been ordered so the team can explain a coherent next step. 4
5. Your preferences belong in the screening decision. A genetics professional can explain the information each option supplies and help you weigh uncertainty. You can ask for counseling before choosing testing, rather than waiting for an unexpected result to request support. 5

How do the stages of integrated screening fit together?

• First trimester. Identify the exact screening pathway, its first-stage components, and the date of the next step.
• Second trimester. Complete or revise the agreed second-stage plan within the laboratory window.
• Third trimester. Review any unresolved questions with the care team instead of assuming silence means a negative result.

Questions to bring to your prenatal team