Dual marker (PAPP-A + free β-hCG)
Fertility, pregnancy, and antenatal
- Specimen
- Serum (11–13 wk)
- Indications noted in the research
- First-trimester aneuploidy screen
From the Docwrite test research, 11 September 2026. About the sources. This is a reference catalogue; the prescribing clinician and performing lab determine the appropriate test, sample and preparation. Package contents vary by provider.