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Antibody test for unexplained blood clots or recurrent pregnancy loss

PS/PT Antibody Test for Blood Clots & Pregnancy Loss

Phosphatidylserine/Prothrombin (PS/PT) Antibody (IgG)

  • Screen for unexplained blood clotting risk
  • Assess recurrent pregnancy loss causes
  • Detect autoimmune clotting antibody markers
$379
First results as soon as overnight*

All results normal? Get your money back. First-time customers only. File a support ticket titled “Money Back Guarantee” with your order number within 15 days of receiving your results. STD, Sickle Cell, and gift orders aren’t eligible. Full terms apply. guarantee
No questions asked refunds
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Prescription & all lab fees included

Go directly to the lab, no extra fees

Doctor's guidance included

Easy to understand results

Fast & convenient

Lab visit as quick as 10 mins in & out

  • Many results come back overnight *
  • 90-day money back guarantee
  • Save time & skip the doctor’s office
  • Lab visit as quick as 10 minutes
  • Results explained, with clear next steps
  • LegitScript certified
  • No questions asked refunds
  • The price you see is the price you pay
  • Many results come back overnight *
  • 90-day money back guarantee
  • Save time & skip the doctor’s office
  • Lab visit as quick as 10 minutes
  • Results explained, with clear next steps
  • LegitScript certified
  • No questions asked refunds
  • The price you see is the price you pay

What's this test for?

This test is ideal if you're experiencing unexplained blood clots, or if you've had repeated miscarriages or pregnancy complications that doctors couldn't fully explain. It looks for antibodies that can make your blood more likely to clot abnormally. It's also useful if you've already been diagnosed with an autoimmune clotting disorder and need more information about your antibody status.

What's included in this test?

This test measures a single antibody type that targets a combination of phosphatidylserine and prothrombin, two substances involved in blood clotting. Checking for this antibody helps identify an autoimmune pattern that's strongly linked to abnormal blood clotting and pregnancy complications, even when other standard clotting antibody tests come back negative.

What happens after I get my results?

Your results will show up in your account with a clear explanation of what's considered a normal range for this antibody. If your result comes back positive, next steps usually involve retesting to confirm persistence, since a single positive result isn't enough to diagnose a clotting disorder on its own. A full downloadable lab report is available in your account, and you can track this result over time using the trends feature to see if levels change. If your result is very high or you have symptoms of an active clot, such as sudden leg swelling or chest pain, seek medical care right away.

Who should consider this test?
This test is a good fit for people who've had a blood clot with no clear cause, especially at a younger age or in an unusual location. It's also worth considering if you've had two or more unexplained pregnancy losses or other pregnancy complications like severe preeclampsia. People already being monitored for lupus or other autoimmune conditions may also want this information.
What symptoms indicate I may need this test?
Symptoms that may point to a need for this test include swelling, pain, or warmth in a leg (possible sign of a deep vein clot), sudden shortness of breath or chest pain, or unexplained bruising. On the pregnancy side, repeated miscarriages, stillbirth, or severe complications like preeclampsia can also be signs worth investigating. If you're having any of these symptoms right now, especially chest pain or trouble breathing, seek medical care immediately rather than waiting for test results.
When will I get my results?
Results are typically ready within about 7 days of your lab visit. You'll get a notification once your report is available, and you can log into your account anytime to view the full breakdown of your result.
How can I naturally support healthy blood flow and clotting balance?
While antibody levels themselves aren't controlled by lifestyle, you can support overall healthy circulation by staying active, avoiding long periods of sitting or immobility, staying well hydrated, and not smoking. Eating a diet rich in omega-3 fatty acids and antioxidants may also support vascular health. These steps don't replace medical treatment if you're diagnosed with a clotting disorder, but they're good general habits.
What does a positive result mean?
A positive result means this specific antibody was detected in your blood, which is associated with a higher risk of abnormal clotting and pregnancy complications. One positive test isn't usually enough for a diagnosis — these antibodies need to show up on two tests at least 12 weeks apart to be considered clinically significant. If you test positive, it's worth discussing retesting timing and any current symptoms with whoever is managing your care.
What causes this antibody to be elevated?
This antibody is typically produced by the immune system mistakenly targeting your own proteins involved in clotting, a hallmark of autoimmune conditions like antiphospholipid syndrome. It can also occur alongside other autoimmune diseases such as lupus, or sometimes appear temporarily after infections. In some cases, no clear underlying cause is ever identified.
How often should I retest?
If your first result is positive, confirming with a repeat test at least 12 weeks later is standard practice, since temporary antibody spikes can happen. If you're negative and have no symptoms, there's usually no need to retest unless new symptoms or pregnancy complications arise. Anyone managing a known clotting condition may want to retest periodically as part of ongoing monitoring.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Get lab order in minutes, results come overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Phosphatidylserine/Prothrombin (PS/PT) Antibody (IgG) Negative
Demo results
Negative Positive
Negative

What this means

A negative result means this antibody was not detected in your blood, which lowers the likelihood that autoimmune antibodies are contributing to clotting or pregnancy problems. This is the expected, reassuring result for most people without a clotting disorder. If your symptoms continue despite a negative result, other causes may need to be explored.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More advanced tests may take longer due to complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Find a lab near you

Search Quest Diagnostics and LabCorp locations available through Private MD Labs.

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PS/PT Antibody Test for Blood Clots & Pregnancy Loss

  • Screen for unexplained blood clotting risk
  • Assess recurrent pregnancy loss causes
  • Detect autoimmune clotting antibody markers
$379
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.
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For informational purposes only. Not medical advice.