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Test Code 5158 Dihydrotestosterone

Specimen Containers and Fixatives

Gold Top Tube (SST)

Specimen Required

NorthShore Lab Services: draw 2.5 mL (1.3 min) blood, centrifuge and submit 1.0 mL (0.5 min) frozen serum.

Hospital setting: submit 2.5 mL (1.3 min) blood.

Frozen

Centrifuge and send frozen serum.

Day(s) and Time(s) Performed

Monday – Friday, 3 days

Reference Values

Premature Infants (ng/dL)

Female: 2-13

Male: 10-53

Full Term Infant (ng/dL)

Female: <2-15

Male: 5-60

1-7 months

Female: Levels decrease during the first month to <3 ng/dL and remain there until puberty.

Male: Levels decrease during the first week, increase to a maximum of 85 ng/dL by day 60 and then decrease to prepubetal levels by 7 months.

Prepubetal Children: <3 ng/dL

Female (ng/dL)

Tanner Stage 1 (<9.8 years): <3

Tanner Stage 2 (9.8-14.5 years): 5-12

Tanner Stage 3 (10.7-15.3 years): 7-19

Tanner Stage 4 (11.8-16.2 years): 4-13

Tanner Stage 5 (12.8-17.3 years): 3-18

Male (ng/dL)

Tanner Stage 1 (9.8 years): <3

Tanner Stage 2 (9.8-14.5 years): 3-17

Tanner Stage 3 (10.7-15.4 years): 8-33

Tanner Stage 4 (11.8-16.2 years): 22-52

Tanner Stage 5 (12.8-17.3 years): 24-65

Adults (ng/dL)

Female: 4-22

Male: 30-85

Method Name

RIA after HPLC

CPT Code Information

82642

LOINC Code Information

1848-1