500 uL Serum or Plasma
- Collect 1mL whole blood, spin, separate and freeze (-20oC)
- Specimens collected on an SST tube should be separated within 90 minutes of receipt.
- Avoid repeated freeze-thaw cycles.
Progesterone also known as P4 (pregn-4-ene-3,20-dione) is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy (supports gestation) and embryogenesis of humans and other species. Progesterone belongs to a class of hormones called progestogens, and is the major naturally occurring human progestogen. Levels increase sharply during the luteal phase of the menstrual cycle. The level increases from 9 to 32 weeks of pregnancy.
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