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Embryo Genetic Testing Results

Embryo genetic testing results can help your fertility doctor identity which embryos are best for transfer.

With the right information, parents can make informed decisions that align with their family-building goals.

Learn more about embryo genetic testing

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This article will look deeper at what chromosomal and genetic abnormalities in embryos can be found as well as the probability of genetically normal embryos and their impact on test results. 

Embryo Genetic Testing Results: PGT-A

PGT-A, or preimplantation genetic testing for aneuploidy, looks at the chromosomal abnormalities. Aneuploidy is when an embryo has an abnormal number of chromosomes and it’s one of the most common causes that an embryo fails to implant.

Euploid

A euploid embryo is an embryo with the correct number of chromosomes, 46, and is therefore considered “normal.”

Euploid embryos have a better chance of implantation and a less likely chance of miscarriage or your baby having birth defects as a result of chromosomal abnormalities.

Aneuploidy

As described above, an aneuploidy embryo is considered “abnormal” due to an incorrect number of chromosomes.

Aneuploidy embryos have an increased chance of implantation failure or pregnancy loss and can lead to:

  • Down syndrome

  • Turner syndrome

  • Patau syndrome

    Mosaic

    Mosaic embryos are embryos made up of cells that have the right and wrong number of chromosomes.

    Mosaic embryos don’t necessarily mean implantation or a pregnancy won’t take place, the success rates for implantation and live birth rates are lower than euploid embryos but embryos with chromosomal abnormalities can self-correct and be used in certain situations.

    Embryo Genetic Testing Results: PGT-M

    PGT-M helps prevent you or your partner from passing on known genetic conditions from you or your family by identifying embryos with specific gene mutations that you or your partner carry prior to the embryo transfer.

    Family history of monogenic diseases can increase the probability of a child to be born with a genetic mutation. PGT-M can prevent you from passing down genetic disorders such as:

    • Cystic fibrosis
    • Huntington’s cholera
    • Marfan syndrome
    • Tay-Sachs
    • Sickle cell anemia
    • Hemophelia
    • Muscular dystrophy
    • And more

    How Many Embryos Pass Genetic Testing?

    Although chromosomal abnormalities can occur with any embryo or pregnancy, age plays a direct role when it comes to the success of embryos that pass PGT.

    Washington University Physicians and the lab they work with most often gave the following figures when it came to embryo genetic testing results for abnormal results based on age: 

    • 33% for people under 30

    • 38% for people aged 30-34

    • 47% for people aged 35-37

    • 60% for people aged 38-40

    • 76% for people aged 41-42

    • 84% for people 43 or older

      As you can see, the younger the age of whoever is providing the eggs for the embryos, the higher the chance there is for an embryo to be graded highly and selected for transfer.

      Find out more about embryo genetic testing costs

      What Are the Grades of Embryos in Genetic Testing?

      The grades of embryos that use PGT help identity how far along an embryo is in its development. Grading systems, however, are usually dependent on the professional you work with as how they view and grade embryos may differ from another professional.

      What Is the Genetically Normal Embryo Success Rate?

      According to the Reproductive Medicine Associates (RMA), genetically normal embryos that were created through IVF have a 94.9% chance of pregnancy.

      If you have questions, ask them. Embryo genetic testing results will help your fertility clinic determine which embryos will be transferred based on which ones have the best chances of becoming a pregnancy.

      Be sure to talk to them more in-depth about any questions you have about their grading process and how they select the best embryos.

      Contact us online if you need a fertility clinic, we can connect you with reputable clinics close to you.

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