What Does NxGen MDx Screen For?

We screen for up to 120 genetic disorders that can affect your pregnancy, the health of your baby, and your family's future. You can learn more about our various screens — and which sets of screens (or "panels") align with where you are in your reproductive journey.

What Does NxGen MDx Screen For?

Mucopolysaccharidosis Type I

What Your Test Results Mean:

Test results indicate that you are a carrier of mucopolysaccharidosis type I. Carriers are not expected to show symptoms. You and your partner would both have to be carriers of mucopolysaccharidosis type I for there to be an increased chance to have a child with symptoms; this is known as autosomal recessive inheritance. Carrier testing of your partner or donor is recommended in addition to consultation with a genetic counselor for a more detailed risk assessment.

Since this is an inherited gene change, this information may be helpful to share with family members as it may impact their family planning.

Disease Explained:

Mucopolysaccharidosis type I, also known as Hurler syndrome, is an inherited lysosomal storage disorder in which sugar molecules accumulate in the body and can lead to organ damage. Individuals with mucopolysaccharidosis type I may appear normal at birth and typically develop symptoms within the first two years of life. The symptoms can include vision issues and possible blindness due to cloudy corneas, heart valve issues, narrowed arteries, lung disease with frequent infections, and cognitive impairment.


Prognosis is typically poor. The average age of the onset of symptoms is 10 months, and individuals usually die approximately eight years after symptom onset.


There is no cure for mucopolysaccharidosis type I, but enzyme replacement therapy is available. Enzyme replacement therapy can lead to functional improvements; however, the neurological complications of the disorder do not typically improve with enzyme replacement therapy. Bone marrow transplant is possible and can help prolong lifespan. Treatment is otherwise symptomatic.

Which Screens Are Right for You?

Determining which screens or set of screens are right for you will depend on where you are in your reproductive journey. Tell us where you are today so you can learn more about how to move forward tomorrow.

Planning to Have a Baby Already Expecting
Which Screens Are Right for You?

Talk to a Genetic Counselor

As a NxGen client, you'll have access to personal genetic counselors who can help explain the results of your screens and provide insight on how to move forward. To schedule a personal conference to discuss your screen results, call (855) 776-9436. or click the link below.

Discuss Your Screening Results