Le One Day test

One Day Test

The One Day Test assesses not only the risk of Trisomy 21, but of Trisomy 13 and 18 as well, which are also linked the mother’s age. This combined test detects 90% of affected fetuses.

Prenatal prevention and screening center

One Day Test

  • Maternal blood test

    to evaluate first trimester maternal serum markers (free beta and PAPP-A)

  • Anatomy scan

    performed by a sonographer specialized in prenatal diagnostics:

    • Measurement of nuchal translucency and analysis of other markers indicating a risk of chromosomal abnormality
    • Early screening for the main fetal abnormalities identifiable at this stage
    • Analysis of the uterine cervix and the placenta
  • Prenatal consultation

    with a specialist to discuss your screening test results

After this series of exams and consultations, other tests designed to screen (in particular NIPT on maternal blood [link]) or diagnose (chorionic villus sampling or amniocentesis) may be ordered.


You will also receive information about hygiene and preventing infection.

The One Day Test allows you to undergo all the necessary tests over a half-day. Results are available in less than three hours.

Fetal Medicine

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American Hospital of Paris
2020-08-27T14:31:51