Laboratory Medicine

Test catalogue

Insulin-like Growth Factor-1 (IGF1)
Test Name Insulin-like Growth Factor-1 (IGF1, Somatomedin)
Specimen Type / Requirements Container Type = 1 Gold Top (or 1 Lavender or Li-Heparin Tube) Preferred Volume = 1 mL Serum Minimum Volume = 0.5 mL Serum Tubes must fill to at least ½ or greater of its vacuum capacity
Specimen Handling Collection Instructions: Collect specimens in either a red, gold, lavender, or green top tube. Both serum and EDTA or lithium heparin plasma are acceptable specimen types. Remember to write your initials, date, and time of collection on the label. Laboratory Staff Instructions Spin sample using cold centrifuge, separate from cells within 2 hours of collection. Store at -80C. Rejection Criteria: Unlabeled or samples of non sufficient quantity. Stability: Stable at room temperature for 1 day, refrigerated for 7 days, frozen for 1 year. Maximum 3 freeze-thaw cycles. Transportation: Send sample on ice to core lab as soon as possible.
Required Documentation
Turnaround Time (TAT) 7 Days	Test Utilization N/A
Reference Value See Reference Values Here
Test code IGF1	Methodology Sandwich Immunoassay
Testing Location SMH-Biochemistry	Other Information Last Updated: June 22, 2026

Insulin-like Growth Factor-1 (IGF1)

Test Name

Insulin-like Growth Factor-1 (IGF1, Somatomedin)

Specimen Type / Requirements

Container Type = 1 Gold Top (or 1 Lavender or Li-Heparin Tube)

Preferred Volume = 1 mL Serum

Minimum Volume = 0.5 mL Serum

Tubes must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect specimens in either a red, gold, lavender, or green top tube. Both serum and EDTA or lithium heparin plasma are acceptable specimen types. Remember to write your initials, date, and time of collection on the label.

Laboratory Staff Instructions Spin sample using cold centrifuge, separate from cells within 2 hours of collection. Store at -80C.

Rejection Criteria: Unlabeled or samples of non sufficient quantity.

Stability: Stable at room temperature for 1 day, refrigerated for 7 days, frozen for 1 year. Maximum 3 freeze-thaw cycles.

Transportation: Send sample on ice to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

7 Days

Test Utilization

N/A

Reference Value

See Reference Values Here

Test code

IGF1

Methodology

Sandwich Immunoassay

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 22, 2026