The PreTRM® test is a simple blood test done during the 19th and 20th weeks of pregnancy that is highly predictive of premature birth. You may be wondering why weeks 19 and 20.  Our team of incredibly talented doctors and researchers have discovered that during that precise window, two proteins in your blood  are highly predictive of premature birth risk.

How the test process works

The test is as simple as having your doctor order the test by filling out a Test Request Form and going to a lab to have a blood sample taken. Within a couple weeks your doctor receives the results that indicate your individual percentage risk of premature birth. Then together you can decide on a pregnancy plan to manage your risk level that is individually created for you and this pregnancy.

​Go to LabCorp for your blood draw

When your doctor has given you the Test Request Form, make a blood draw appointment between weeks 19-20 of your pregnancy at a LabCorp patient service center.

Sera Prognostics, maker of the PreTRM test, has formed a collaboration with Laboratory Corporation of America, more commonly known as LabCorp, a world leading life sciences company. It operates one of the largest clinical laboratory networks in the world, with a United States network of nearly 2000 patient service centers.  

Go to www.labcorp.com to find the most convenient center for you. We would also be happy to schedule an appointment for you through our Pretrm support representatives who can be reached at 801-990-6605.

Before you go…

Remember to take the Test Request Form to your blood draw appointment. They cannot draw your blood for the test without it.

Be ready with your payment. Because the PreTRM test is brand new, it’s not yet covered by insurance. Currently, the PreTRM test​ is a self-pay test, which is similar to other complex laboratory tests. If you have a flexible spending account or HSA, you can use those funds to help cover the costs.

What happens after the blood draw

 Your blood will be placed in a centrifuge (spinner) to separate the serum from the blood. The serum is then placed on dry-ice and shipped to our PreTRM Lab.  We will process your sample using mass spectrometry technology to measure the serum protein levels that are highly predictive of premature birth.  We apply an algorithm that, based upon your protein levels, predicts your individual risk for having a premature baby.

Getting the results and how to read them


​About two weeks later, your doctor will get the test results.

We thought you might like to see what the test results will look like. The sample test results (insert link) may help you better understand your own test results when they come back to your doctor and your doctor shares them with you. 

What’s remarkable about the PreTRM test is that it shows the individual percentage risk of premature birth compared to the 7.3% baseline or average risk of all pregnant women.  For example, if your test results were higher than the average 7.3%, say 21%, it would mean you would be 3 times more likely to deliver prematurely than normal.  The farther away from the 7.3% baseline, the greater the percentage of risk would be. Detecting risk early enough allows you and your caregiver to take steps that could help manage your risk with the goal being to give your baby the best start in life.

We can put your PreTRM test on the fast track if you call now

If you are close to weeks 19 and 20 and have not ordered the test, we can help you get the test ASAP.

  1. Call or text us with your doctor’s practice information.
  2. We’ll call your doctor‘s practice to make sure they have the information they need.
  3. You call your doctor to request the test.
  4. We’ll help you find a nearby LabCorp patient service center where you can have your blood drawn.

It’s that easy.  But you don’t have a minute to wait.  Call us or text us as soon as possible, 801-990-6605.