Close Alert Banner
Skip to Content
Visit BORNOntario.caVisit BORN.ca
Contact Us
FR

BORN Ontario Logo

Contact Us icon
  • What is Prenatal Screening?
    • What Do We Screen For?
    • Multiple Marker Screening (MMS)
    • Non-invasive Prenatal Testing (NIPT)
    • Other Kinds of Screening
    • Less than 14 Weeks' Pregnant
    • 14-21 Weeks' Pregnant
    • Greater than 21 Weeks' Pregnant
    • For Twins or More Than Two Babies
  • Results and Next Steps
    • Multiple Marker Screening (MMS) Results
    • Non-invasive Prenatal Testing (NIPT) Results
    • Invasive Diagnostic Testing
  • Requisitions and Provider Tools
    • Multiple Marker Screening (MMS) Requisitions
    • Non-invasive Prenatal Testing (NIPT) Requisitions
    • Provider Tools
  • For Sonographers
    • NT Registration
    • NT Quality Assurance
    • Resources and POC Tools
  • About Us
    • Contact Us
    • Careers
    • Committees and Working Groups
    • Events Calendar
    • Get Involved
    • Partners
    • PSO News
    • Subscribe to PSO updates
What is Prenatal Screening?Non-invasive Prenatal Testing (NIPT)
  • Open new window to share this page via Facebook Facebook
  • Open new window to share this page via LinkedIn LinkedIn
  • Open new window to share this page via Twitter Twitter
  • Email this page Email

double helix DNA

Non-invasive Prenatal Testing (NIPT)

During a pregnancy, there are small pieces of genetic material (known as DNA) from the placenta that can be found in the bloodstream.

Non-invasive prenatal testing (NIPT) is a very accurate form of prenatal screening that looks at this DNA and can tell what the chances are that a baby has one of the conditions screened.

Non-invasive prenatal testing

It is important to remember that NIPT is a screening test and will not give a definite answer about any of the conditions.

Conditions screened

NIPT that is covered by the Ontario Health Insurance Plan (OHIP) will screen pregnancy for:

  • trisomy 21 (Down syndrome)
  • trisomy 18
  • trisomy 13

Discuss with your health care provider whether you would like to use NIPT to screen your pregnancy for the fetal sex and any differences in the sex chromosomes (called sex chromosome aneuploidy).

If you choose to pay for NIPT, discuss with your health care provider whether you would like to screen for any of the additional conditions that these companies offer.

Additional conditions screened

Some of the NIPT labs are able to use this bloodwork to screen pregnancies for other genetic conditions, specifically microdeletion syndromes. It is important to know that these conditions are rare in the general population and happen when there are missing pieces of chromosomes (ie. deletions). The chances of a baby having one of these conditions is not related to maternal age (or the age of the egg donor).

At this time, the current provincial guidelines do not support the use of NIPT to screen for microdeletions.

Benefits of NIPT

Accuracy: NIPT is a very accurate screening test for trisomies 21, 18 and 13. It is more accurate than conventional screening (eFTS and MSS), detecting more than 99% of pregnancies where the baby has trisomy 21.

Timing: NIPT can be done as early as 9 weeks of pregnancy at some labs and results are typically reported within 7-10 days. It is important to check the gestational age requirements at your testing lab before proceeding.

No risk: Because NIPT is a simple blood test, it poses no risk to pregnancy.

Limitations of NIPT

Not diagnostic: NIPT is a very good screening test but it cannot give a definite “yes” or “no” answer. Only invasive diagnostic testing (e.g. chorionic villus sampling or amniocentesis) can do that.

Incidental findings: Some of the DNA in the NIPT blood sample is from the mother (or donor) and this means that the test is also looking at maternal DNA, not just the baby's. In rare cases, NIPT may identify a genetic difference in the maternal (or the donor) DNA. This type of result should be further reviewed with a genetic counsellor who can discuss options for further testing.

When NIPT cannot be done

NIPT may not be available if:

  • there is a vanishing twin – ongoing pregnancy that started as a multiple pregnancy with subsequent miscarriage of one or more baby
  • there are more than two babies (triplets, quadruplets, etc.)

How the funding for NIPT works

NIPT is available to all pregnant individuals in Ontario but will only be covered by OHIP if specific criteria are met.

For patients that do not meet the requirements, NIPT can be paid for out of pocket. The cost varies between the labs and health care providers will need to complete the appropriate self-pay requisition (lab-specific) for testing.

OHIP will fund NIPT if:

Category I criteria (can be ordered by any physician)

  • a positive prenatal screening result from multiple marker screening (MMS) for this pregnancy
  • the maternal age (or age of the egg donor) will be 40 years or older at the expected date of delivery
    • in the context of in vitro fertilization, maternal age is defined by the age of the egg donor (patient or donor)
  • the nuchal translucency (NT) measurement is ≥3.5mm
  • there is a personal history of a previous pregnancy or child with a specific chromosome condition

If you meet one of these requirements, your health care provider can use the OHIP-funded requisition for testing.

Category II criteria (must be ordered by a genetics or maternal-fetal medicine specialist)

  • there are findings on ultrasound which are associated with an increased chance for trisomy 21, trisomy 18 or trisomy 13
  • there is risk for a sex-linked genetic condition
  • it is a twin pregnancy and maternal age (or the age of the egg donor) will be over the age of 35 at the expected date of delivery
  • the ultrasound shows findings suggestive of a sex chromosome difference
  • the ultrasound shows findings suggestive of a disorder of sex determination

If you meet one of these requirements, your health care provider can use the OHIP-funded requisition for testing.

NIPT Results

NIPT results are reported as either a “high risk” or “low risk” result. In a small percentage of cases, the laboratory will ask for a repeat blood draw because the result is reported as “no call” or “failed”.

It is important to know that a low-risk NIPT result does not guarantee a healthy baby.

IMPORTANT: Patients with a low-risk NIPT result should still be offered a nuchal translucency (NT) ultrasound between 11-14 weeks' gestation.

  • What is Prenatal Screening?
    • What Do We Screen For?
      Toggle Section What Do We Screen For? Menu
      • Chromosomes
      • Trisomy 21 (Down syndrome)
      • Trisomy 18
      • Trisomy 13
      • Sex chromosome differences
    • Multiple Marker Screening (MMS)
      Toggle Section Multiple Marker Screening (MMS) Menu
      • Enhanced First Trimester Screening (eFTS)
      • Maternal Serum Quadruple Screen (MSS)
    • Non-invasive Prenatal Testing (NIPT)
    • Other Kinds of Screening
    • Less than 14 Weeks' Pregnant
      Toggle Section Less than 14 Weeks' Pregnant Menu
      • Enhanced First Trimester Screening (eFTS)
      • Nuchal Translucency Ultrasound
        Toggle Section Nuchal Translucency Ultrasound Menu
        • Increased Nuchal Translucency
      • Non-invasive Prenatal Testing
    • 14-21 Weeks' Pregnant
      Toggle Section 14-21 Weeks' Pregnant Menu
      • Maternal Serum Quadruple Screen (MSS)
      • Non-invasive Prenatal Testing
      • Detailed Anatomy Ultrasound
    • Greater than 21 Weeks' Pregnant
      Toggle Section Greater than 21 Weeks' Pregnant Menu
      • Non-invasive Prenatal Testing
      • Detailed Anatomy Ultrasound
    • For Twins or More Than Two Babies

Contact Us

Subscribe to this page

Prenatal Screening Ontario logo

BORN Ontario logo

Our Website

  • What is Prenatal Screening?
  • Results and Next Steps
  • Requisitions and Provider Tools
  • For Sonographers
  • About Us

Helpful Links

  • Contact Us
  • Sitemap
  • Website Feedback
  • View our Facebook Page
  • View our Twitter Page

Contact Us

Prenatal Screening Ontario 
CHEO Research Institute 
Centre for Practice-Changing Research Building 
401 Smyth Road 
Ottawa, ON K1H 8L1

Phone 613-737-2281

Toll Free 1-833-351-6490

Monday to Friday, 8:00 AM to 4:00 PM

Copyright © 2019 BORN Ontario

Designed by eSolutionsGroup

Close Old Browser Notification
Browser Compatibility Notification
It appears you are trying to access this site using an outdated browser. As a result, parts of the site may not function properly for you. We recommend updating your browser to its most recent version at your earliest convenience.