Viability, Dating and Nuchal Translucency Ultrasounds
The Centre de Gynécologie et de Maternité de LaSalle offers first-trimester ultrasounds in Montreal, including viability and dating ultrasounds and nuchal translucency ultrasound. These examinations can help assess how a pregnancy is progressing, establish gestational age and, depending on the examination, contribute to prenatal screening.
Viability and Dating Ultrasound
A viability and dating ultrasound is performed early in pregnancy. It can help confirm the location of the pregnancy, identify embryonic or fetal cardiac activity, determine the number of fetuses and estimate gestational age.
Depending on the stage of pregnancy and the clinical indication, the ultrasound may be performed abdominally or transvaginally. Our team will provide the appropriate preparation instructions when your appointment is scheduled.
Nuchal Translucency Ultrasound
A nuchal translucency ultrasound is a first-trimester scan that measures the space beneath the skin at the back of the baby’s neck. This measurement can be considered together with other prenatal screening information to assess the probability of certain chromosomal conditions.
In Quebec, the first-trimester ultrasound is generally performed between the 11th and 13th weeks of pregnancy. Nuchal translucency measurement may be performed during this ultrasound when indicated.
Nuchal Translucency and Prenatal Screening
Nuchal translucency measurement can be part of first-trimester prenatal screening. It is a screening measurement and does not provide a diagnosis on its own.
To learn more about screening options, blood tests and available prenatal tests, visit our prenatal screening page.
When Are These Ultrasounds Performed?
A viability and dating ultrasound is generally performed early in pregnancy, while nuchal translucency measurement is performed later in the first trimester. The recommended timing depends on the type of examination and your clinical situation.
How to Prepare for Your Ultrasound
Preparation may vary depending on the type of ultrasound and the stage of pregnancy. When your appointment is scheduled, our team will let you know whether you need to arrive with a full bladder or follow any other instructions before the examination.
Book an Appointment at Gyn-Echo
Would you like to schedule a viability, dating or nuchal translucency ultrasound? Contact the Centre de Gynécologie et de Maternité de LaSalle to learn about availability and preparation instructions for your examination.
Phone: 514 364-3700
To learn more about other examinations available at the clinic, visit our gynecological and obstetrical ultrasound services.
Frequently Asked Questions
When is a nuchal translucency ultrasound performed?
Nuchal translucency measurement is performed during the first trimester, generally between the 11th and 13th weeks of pregnancy. The exact timing of the examination will depend on your situation.
What is the difference between a viability ultrasound and a nuchal translucency ultrasound?
A viability ultrasound is mainly used to assess the early development of a pregnancy and establish gestational age. Nuchal translucency is a measurement performed later in the first trimester that can contribute to prenatal screening.
Can a nuchal translucency ultrasound diagnose a chromosomal condition?
No. Nuchal translucency is a screening measurement used to assess probability rather than establish a diagnosis. Depending on the results and your situation, your healthcare professional may recommend additional testing.
Do I need a full bladder for my ultrasound?
It depends on the type of ultrasound and the stage of pregnancy. Specific preparation instructions will be provided when your appointment is scheduled.