A patient seated in the chair before a blood draw
In person

TSH (Pregnancy)

Your TSH level, read against pregnancy ranges, from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
No fasting. If you have had fluorescein angiography, wait 3 days.
Results
1 to 3 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

Thyroid-stimulating hormone (TSH) comes from the pituitary gland and tells your thyroid how much hormone to make. During pregnancy it usually runs lower, especially early on, so this test compares your result with ranges set for pregnancy. It is meant for people who are pregnant.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

This test is for people who are pregnant and want their thyroid checked against pregnancy-specific ranges, often early in pregnancy and with their prenatal care provider.

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your result shows your TSH level compared with ranges set for pregnancy, which your prenatal care provider can use to decide whether more thyroid testing is needed.

Thyroid-stimulating hormone (TSH), pregnancy
TSH tells your thyroid how much hormone to make. TSH tends to be lower during pregnancy, especially early on. This version of the test is reported against pregnancy-specific reference ranges, so the result reflects what is expected for someone who is pregnant.
Why it’s measured: TSH read against reference ranges set for pregnancy rather than general adult ranges.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting. If you have had fluorescein angiography, wait 3 days. Nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 1 to 3 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

TSH is reported as a number and compared with the lab’s pregnancy-specific reference ranges, which differ by stage of pregnancy.

  • Your number next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

Share this result promptly with your prenatal care provider, who reads it with your pregnancy and health history and decides on next steps.

Pregnancy TSH or standard TSH?

Same hormone, read against different ranges.

TSH (pregnancy)

TSH compared with pregnancy-specific ranges.

Reference ranges
Set for pregnancy, by stage
For
People who are pregnant
Reviewed with
Your prenatal care provider

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

Pregnancy changes how the thyroid works. TSH usually runs lower in pregnancy, especially in the first trimester, so ranges for adults who are not pregnant may not fit.

Professional thyroid guidelines recommend reading TSH in pregnancy against ranges set for the specific test and stage of pregnancy, which is how this test is reported.

This test is set up for people who are already pregnant, so its ranges may not fit if you are not. If you are planning a pregnancy, the standard TSH test compares your result with ranges for adults who are not pregnant. A healthcare provider can advise which test fits your situation.

If you have had fluorescein angiography, an eye imaging test that uses a dye, the lab asks you to wait at least 3 days before this draw, because the dye can make TSH read falsely low. People on dialysis may need to wait longer.

Tell your healthcare provider about any recent imaging with dye. Don’t stop or change any medicine or supplement without talking with your healthcare provider.

TSH is one thyroid number. It does not measure thyroid hormone itself or thyroid antibodies, and one result is not enough to identify a thyroid condition. Your prenatal care provider decides whether other tests are needed and what your result means for your pregnancy.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.