Ulta Lab Tests

Rh, Weak D (DU) Test

The Rh, Weak D (DU) Test determines whether the RhD antigen is weakly expressed on red blood cells. This test helps identify individuals who may appear Rh-negative on standard testing but still carry the antigen at low levels. It provides essential information for blood transfusions, pregnancy management, and preventing hemolytic disease of the newborn, supporting safe clinical decisions in hematology and transfusion medicine.

Blood
Blood Draw
DU Variant Test
There are no preparation instructions.

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Also known as: DU Variant, Rh Weak D DU

Rh, Weak D (Du)

*Important Information on Lab Test Processing Times: Ulta Lab Tests is committed to informing you about the processing times for your lab tests processed through a national lab. Please note that the estimated processing time for each test, indicated in business days, is based on data from the past 30 days across the 13 laboratories for each test. These estimates are intended to serve as a guide and are not guarantees. Factors such as laboratory workload, weather conditions, holidays, and the need for additional testing or maintenance can influence actual processing times. We aim to offer estimates to help you plan accordingly. Please understand that these times may vary, and processing times are not guaranteed. Thank you for choosing Ulta Lab Tests for your laboratory needs.

The Rh, Weak D (DU) Test test contains 1 test with 1 biomarker .

Rh is needed to identify candidates for Rh immune globulin and to assess the risk of hemolytic diseases of the newborn.

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