One 6 mL plain red top tube. (no gel)

Transfer 2.5 mL serum refrigerated (Min: 1.5 mL).

* Collection Instructions *

• Norethindrone acetate/Norethisterone acetate is known to interfere with the measurement of estrone using the Quest Diagnostics LC-MS/MS method. This test should not be used to quantitiate estrone in patients taking this drug.
• Specify age and sex on test requisition.

Ambient: 24 hours

Refrigerated: 7 days

Frozen: 28 days

• Gross hemolysis
• Gold (SST) Top Tubes
• Lipemia
• Grossly icteric