What is the reference range for Progesterone?

The standard reference range for Progesterone is Follicular phase <1 ng/mL; mid-luteal 5–20 ng/mL; method- and timing-specific.. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Progesterone?

Progesterone is measured in 1 test on BiomarkersLabs.com, including Blood Spot LCMS Hormones 7 with SHBG and Thyroids.

Biomarker Reference · P4

What does the Progesterone test measure?

Q: What is Progesterone?

Progesterone is secreted by the corpus luteum after ovulation, sustaining the secretory endometrium and modulating immune and central nervous system function. Blood spot collection reflects total circulating hormone with minimal protein-binding artefact, making it a convenient marker of luteal sufficiency.

Q: Why is Progesterone measured?

Progesterone measurement confirms ovulation, assesses luteal phase adequacy in infertility and recurrent pregnancy loss, and monitors exogenous progesterone therapy. Timing is critical — practitioners order mid-luteal (day 21 of a 28-day cycle) sampling to capture peak secretion.

Q: Which tests measure Progesterone?

Progesterone is measured in 1 test on BiomarkersLabs.com, including Blood Spot LCMS Hormones 7 with SHBG and Thyroids.

Progesterone (P4) is a clinical biomarker used in thyroid-endocrine assessment. Progesterone is secreted by the corpus luteum after ovulation, sustaining the secretory endometrium and modulating immune and central nervous system function. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: Follicular phase <1 ng/mL; mid-luteal 5–20 ng/mL; method- and timing-specific.
Units: ng/mL, nmol/L
Measured In: 1 test
Category: Thyroid

Functional medicine optimalMid-luteal values above 10 ng/mL are widely accepted as evidence of adequate ovulation; functional targets may aim for 15–25 ng/mL, though robust outcome data for these thresholds are limited.

What is Progesterone?

Progesterone is secreted by the corpus luteum after ovulation, sustaining the secretory endometrium and modulating immune and central nervous system function. Blood spot collection reflects total circulating hormone with minimal protein-binding artefact, making it a convenient marker of luteal sufficiency.

Why is Progesterone measured?

Progesterone measurement confirms ovulation, assesses luteal phase adequacy in infertility and recurrent pregnancy loss, and monitors exogenous progesterone therapy. Timing is critical — practitioners order mid-luteal (day 21 of a 28-day cycle) sampling to capture peak secretion.

Reference ranges

Standard reference: Follicular phase <1 ng/mL; mid-luteal 5–20 ng/mL; method- and timing-specific.
Functional medicine optimal: Mid-luteal values above 10 ng/mL are widely accepted as evidence of adequate ovulation; functional targets may aim for 15–25 ng/mL, though robust outcome data for these thresholds are limited.
Units: ng/mL, nmol/L

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.

Tests that measure Progesterone

1 test on BiomarkersLabs.com include this biomarker.

BML-THY-030Comprehensive

Blood Spot LCMS Hormones 7 with SHBG and Thyroids

Progesterone reference range in this test: Follicular phase <1 ng/mL; mid-luteal 5–20 ng/mL; method- and timing-specific.

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Oestradiol (Dried Blood Spot)E22 tests TestosteroneT1 test Dehydroepiandrosterone Sulphate (Dried Blood Spot)DHEA-S2 tests CortisolF1 test Thyroid-Stimulating HormoneTSH5 tests Free ThyroxineFT45 tests Free TriiodothyronineFT35 tests Sex Hormone-Binding Globulin (Dried Blood Spot)SHBG2 tests

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