Small numbers may be nonspecific; other cast types require context.
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What’s searchable?A1 <30; A2 30-300; A3 >300. Persistence ≥3 months matters for CKD classification.
Ask your clinician to use laboratory and indication-specific thresholds; consider timed collection when needed.
Collection completeness must be assessed.
Ranges vary across the follicular phase and by assay.
Ask your clinician to read this result with cycle timing and ovulation status.
Method-dependent; LC-MS/MS is preferred at very low values.
Cycle day and exogenous progesterone timing matter.
Wide physiologic variation.
Single values are pulse- and timing-sensitive; confirm the clinical question.
Ask your clinician to read this result with estradiol, age, and cycle day.
The test method matters.
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