First trimester prenatal trisomy screening
Screening study for assessment of fetal chromosomal anomaly risk in the first trimester of pregnancy. Allows calculation of trisomy probability: Down syndrome (trisomy 21), Edwards syndrome (trisomy 18), and Patau syndrome (trisomy 13). Used for early detection of possible genetic disorders and determination of need for further diagnostic studies.
What the test evaluates:
- Levels of biochemical pregnancy markers in maternal blood (free beta-hCG subunit, PAPP-A)
- Individual risk of fetal chromosomal anomalies considering gestational age, maternal age, and ultrasound data (if available)
Biomaterial: Venous blood
- Draw blood fasting
- Test performed strictly at gestational age of 11-13 weeks + 6 days
Medications:
- Hormonal drugs and pregnancy support medications may affect results
- Inform physician of all medications taken
Recommended for:
- All pregnant women for standard first trimester screening
- With elevated risks by age, family history, or ultrasound results
- For pregnancy management planning and early fetal health assessment
Important: Screening results are not a final diagnosis. With identified elevated risk, consultation with a geneticist and additional diagnostic studies (e.g., non-invasive prenatal test or amniocentesis) are recommended.
