Thank you for your interest in learning more about UNITY Fetal Antigen NIPT. UNITY Fetal Antigen tests for red blood cell fetal antigens, including D, K (Kell), little c, Big C, E, and Fya (Duffy). It is available as an add-on offering to UNITY Aneuploidy testing. To learn more about our testing, visit unityscreen.com.
Access UNITY's
Fetal Antigen TRF
Fetal Antigen TRF
See how easy it is to order UNITY's Fetal Antigen test with our thoughtfully designed Test Requisition Form (TRF). Click below to access our TRF digitally.
The Latest Data with UNITY Fetal Antigen
October 2025
PREGNANCY
High frequency of critical and rising titers in alloimmunized pregnancies with antigen-negative fetuses
July 2024
Obstetrics & Gynecology
Cell-Free DNA Analysis for the Determination of Fetal Red Blood Cell Antigen Genotype in Individuals With Alloimmunized Pregnancies
August 2023
scientific reports
Validation of a non‑invasive prenatal test for fetal RhD, C, c, E, K and Fya antigens
UNITY Fetal Antigen Roundtable Discussion
August 2024
Major advancements in cfDNA-based fetal antigen detection are now shaping clinical practice. With pivotal new data published in Obstetrics & Gynecology (the Green Journal) in August 2024 and the release of updated ACOG guidelines recommending the use of cfDNA for fetal RhD antigen genotyping, clinicians now have stronger evidence and clearer direction than ever before.
Whether you're a general obstetrician or a specialist, hear directly from the Green Journal publication's authors to learn about the latest data and how UNITY Fetal Antigen NIPT can make a difference in clinical care for alloimmunized pregnancies.
Get Started.
Ready to implement a new standard in prenatal care in your practice? Order a test kit to get started.
Already a UNITY provider?
Click here to contact us.
support@billiontoone.com
+1 (833) 408-1488
© 2026 BillionToOne, Inc. all rights reserved