Which tests measure Thyroid Stimulating Hormone?

Thyroid Stimulating Hormone is measured in 1 test on BiomarkersLabs.com, including Female Quick Check Basic Panel.

Biomarker Reference · TSH

What does the Thyroid Stimulating Hormone test measure?

Q: What is the reference range for Thyroid Stimulating Hormone?

The standard reference range for Thyroid Stimulating Hormone is Approximately 0.4–4.5 mIU/L in non-pregnant adults; trimester-specific ranges apply in pregnancy. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Thyroid Stimulating Hormone (TSH) is a clinical biomarker used in female-hormones assessment. Thyroid stimulating hormone is secreted by anterior pituitary thyrotrophs under negative feedback from circulating thyroid hormones. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: Approximately 0.4–4.5 mIU/L in non-pregnant adults; trimester-specific ranges apply in pregnancy
Units: mIU/L, µIU/mL
Measured In: 1 test
Category: Female Hormones

Functional medicine optimalApproximately 1.0–2.5 mIU/L is commonly cited as a functional range, though this is not a mainstream guideline threshold

What is Thyroid Stimulating Hormone?

Thyroid stimulating hormone is secreted by anterior pituitary thyrotrophs under negative feedback from circulating thyroid hormones. Because the feedback relationship is log-linear, small changes in free thyroxine produce large amplified changes in TSH, making it the most sensitive first-line indicator of thyroid status in patients with an intact pituitary axis.

Why is Thyroid Stimulating Hormone measured?

TSH is included because thyroid dysfunction is a common and correctable cause of menstrual disturbance, anovulation, and infertility, and because primary hypothyroidism raises prolactin through elevated thyrotrophin-releasing hormone — so an abnormal TSH may explain an abnormal prolactin. It is unreliable in central hypothyroidism, during acute illness, and within six to eight weeks of a thyroid dose change, and pregnancy requires trimester-specific interpretation.

Reference ranges

Standard reference: Approximately 0.4–4.5 mIU/L in non-pregnant adults; trimester-specific ranges apply in pregnancy
Functional medicine optimal: Approximately 1.0–2.5 mIU/L is commonly cited as a functional range, though this is not a mainstream guideline threshold
Units: mIU/L, µIU/mL

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

Tests that measure Thyroid Stimulating Hormone

1 test on BiomarkersLabs.com include this biomarker.

BML-HRF-007Comprehensive

Female Quick Check Basic Panel

Thyroid Stimulating Hormone reference range in this test: Approximately 0.4–4.5 mIU/L in non-pregnant adults; trimester-specific ranges apply in pregnancy

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Follicle Stimulating HormoneFSH1 test Luteinising HormoneLH1 test Oestradiol (E2)E21 test ProlactinPRL1 test Testosterone, TotalTotal T1 test

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