What's this test for?

This test is essential if you've received a bone marrow transplant from a donor of the opposite biological sex. It helps verify that your body is successfully producing blood cells from the donated marrow rather than your original cells, which is crucial for transplant success. Doctors use this test to detect early signs of transplant rejection or relapse, allowing for timely intervention if needed.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your cell chimerism levels mean for your transplant recovery. These notes include personalized guidance on what percentage of donor cells is expected at your stage of recovery and whether any adjustments to your treatment plan may be needed. Along with your standard lab report, you can track your donor cell engraftment over time using our trends feature, which is especially helpful for monitoring transplant stability during your recovery journey.

What's included in this test?

This test measures FISH, X/Y, Post Opposite Sex Bone Marrow Transplant. This test measures FISH X/Y (Fluorescence In Situ Hybridization for X and Y chromosomes), which identifies whether blood cells contain XX (female) or XY (male) chromosome patterns. This analysis is specifically designed for patients who received bone marrow from a donor of the opposite sex, making it possible to distinguish between your original cells and the donor's cells. By tracking the ratio of donor versus recipient cells, your medical team can assess how well the transplanted marrow has engrafted and whether your body is producing healthy blood cells from the new marrow.

How should I prepare for this test?

No special preparation is typically required for this test, as it's a standard blood draw that analyzes your cellular DNA. However, your transplant team may have specific timing requirements based on your treatment schedule and when they need to monitor engraftment levels. Always follow any instructions provided by your oncologist or transplant coordinator, and inform the lab if you're taking any immunosuppressive medications or have recently received blood transfusions.

When will I get my results?

Results for this specialized genetic test typically take 5-10 business days, as the FISH analysis requires specialized laboratory techniques and expert interpretation. Your transplant team will review the results in the context of your overall treatment plan and recovery timeline. If there are any urgent concerns, your medical team will be notified promptly to ensure you receive appropriate care.

Who should consider this test?

This test is specifically for patients who have undergone an allogeneic bone marrow or stem cell transplant from a donor of the opposite biological sex. It's essential for anyone in the post-transplant monitoring phase, typically tested at regular intervals following transplantation. Your oncologist or transplant team will determine the appropriate testing schedule based on your specific situation, transplant type, and recovery progress.

What does chimerism testing tell doctors about transplant success?

Chimerism testing reveals what percentage of your blood cells come from the donor versus your original cells, which is the most direct way to measure transplant engraftment. Higher percentages of donor cells generally indicate successful transplantation, while decreasing donor cell percentages may signal rejection or disease relapse. This information helps your medical team make critical decisions about adjusting immunosuppressive medications or implementing additional interventions if needed.

How often should I get this test after my transplant?

Testing frequency depends on your transplant type, risk factors, and how your recovery is progressing. Typically, chimerism testing is performed frequently in the first few months post-transplant (every 2-4 weeks), then gradually less often as engraftment stabilizes. Your transplant team will create a personalized monitoring schedule that may include more frequent testing if you're at higher risk for complications or if previous results showed concerning trends.

What happens if my results show decreasing donor cells?

Decreasing donor cell percentages may indicate that your original cells are returning, which could signal graft rejection or disease relapse. Your transplant team will evaluate the results alongside your clinical symptoms, blood counts, and overall health status. They may recommend adjustments to your immunosuppressive medications, additional treatments to boost donor cell engraftment, or in some cases, donor lymphocyte infusions to help restore full donor chimerism.

Can I use this test if my donor was the same biological sex?

No, this specific X/Y chromosome-based FISH test only works when your donor was of the opposite biological sex, as it relies on detecting the difference between XX and XY chromosomes. If your donor was the same sex, your transplant team will use different chimerism testing methods, such as STR (short tandem repeat) analysis, which can distinguish between donor and recipient cells regardless of sex. Your doctor will order the appropriate test based on your specific transplant situation.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. 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. 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. 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. 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. 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. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com 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 support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com and we'll gladly help you.

Transplant Engraftment Test - Donor Cell Monitoring

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
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.
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.
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.
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.
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.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Post Bone Marrow Transplant Monitoring Test

FISH, X/Y, Post Opposite Sex Bone Marrow Transplant

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

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

Post Bone Marrow Transplant Monitoring Test

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

1,000,000+ blood tests later, here's what our customers say