Days Set Up
Daily, 24 hours
Analytic Time

4 - 8 hours (STAT processing not available)

MiChart Code
Fetal Maternal Hemorrhage Screen
Soft Order Code

Test Updated:


Rosette Test

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Rosette test to detect more than 15 mL of Rh positive fetal red cells in an Rh negative mother.

Test Usage

Screening to assess the magnitude of fetal-maternal hemorrhage for Rh Immune Globulin therapy and to determine the need for additional testing.

Reference Range


* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Collect specimen at least 1 hour after delivery in a pink top tube. Send intact specimen at room temperature; do not freeze. Specimens clotted, diluted with IV fluid, or in underfilled or improper tubes will be rejected.

Pink Top Tube
Normal Volume
3 mL whole blood
Minimum Volume
2 mL whole blood

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.