FFES - Specimen: Estradiol Free, Serum (includes Estradiol and SHBG)

Test Catalog

Test Name

Test ID: FFES    
Estradiol Free, Serum (includes Estradiol and SHBG)

Specimen Type Describes the specimen type validated for testing

Serum Red

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Draw blood in a plain red-top tube (serum gel tube is not acceptable). Spin down, pour off into plastic vial within 1 hour of collection, and send 3 mL serum frozen.

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

1.5 mL Note: This volume does not allow for repeat testing.

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected




Warm reject; Cold reject







Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
Serum RedFrozen (preferred)180 days
 Ambient 48 hours
 Refrigerated 48 hours