Nuchal translucency ultrasound: 9 frequently asked questions
Practical guide – Nuchal translucency ultrasound
- What is nuchal translucency echo?
- Why do we need to do this ultrasound?
- How does the nuchal translucency echo take place?
- What are the possible outcomes and how to interpret them?
- Is this echo obligatory?
- Do you need support to experience this stage?
- What are the next appointments after the nuchal translucency echo?
- Are there any risks associated with nuchal translucency ultrasound?
- How to prepare mentally and physically for nuchal translucency echo?
What is nuchal translucency ultrasound?
Nuchal translucency ultrasound, very often called "nuchal translucency echo", is an ultrasound that is performed during the first trimester of pregnancy, usually between the 11th and 14th weeks of amenorrhea. It aims to measure the thickness of nuchal translucency (i.e. the fluid-filled space behind the neck of the fetus).
This measurement, combined with the age of the mother-to-be and sometimes specific blood tests, makes it possible to assess the risk that the baby carries certain chromosomal abnormalities, such as trisomy 21 (Down syndrome).
This meeting can cause concern. It is essential because it provides valuable information for the baby's health and allows you, as a future family, to be supported gently and precisely in each stage of pregnancy monitoring.
Did you know?
Ysé Naissance doulas can complete your pregnancy monitoring, they offer a complete support to prepare and be completely informed steps and steps to plan.
Why do we need to do this ultrasound?
The main objective of nuchal translucency ultrasound is to detect certain risks early, while checking the proper development of the fetus.
- Detection of chromosomal abnormalities (mainly Down syndrome, but also others such as Down syndrome or 18).
- Assessment of embryonic vitality (presence of heartbeat, limb development, positioning of the gestational sac, etc.).
- Verification of pregnancy dating: Nuchal translucency ultrasound provides very accurate dating of the pregnancy (more than the date of the last period), which is useful for ensuring adequate follow-up.
- Observation of possible early malformations.
How does the nuchal translucency echo take place?
The process is generally simple: you will be seated comfortably, often on your back, stomach slightly uncovered.
💧 A gel is applied to your abdomen.
🖥️ The professional uses an ultrasound probe to visualize the baby on screen.
📏 He or she takes various measurements, including the cranio-caudal length of the fetus and, of course, the famous nuchal translucency.
🧘🏻♀️ No special preparation is required, but it may happen that a vaginal examination is offered if abdominal visibility is not sufficient, which remains quite rare at this stage.
🫶🏻 On this occasion, you will also sometimes be able to hear (or even see!) your baby's heartbeat - often a very emotional moment!
Need support with a certified doula?
Reserve your first discovery call.
What are the possible outcomes and how to interpret them?
The results are generally in the form of a measurement (in millimeters) of the nuchal translucency. Interpreting this figure in isolation is not enough, however: it is accompanied by other information regarding maternal age and, in general, a blood test to comprehensively assess the risk.
| Nuchal translucency measurement | Interpretation |
|---|---|
| Less than 3mm | Considered normal at this stage of pregnancy |
| Between 3 and 3.5 mm | To be monitored, potentially increased risk: additional discussions to be expected |
| More than 3.5mm | Additional tests often offered (blood test, amniocentesis or fetal DNA test) |
Is this echo obligatory?
In reality, ultrasound of nuchal translucency is not obligatory. As a mother-to-be, you always have a choice (throughout your follow-up): no one can impose a medical examination on you if you do not want to. In Quebec, this ultrasound is systematically offered, because it is integrated into the integrated prenatal screening (IPD).
Some families prefer not to carry out this examination, often by ethical choice or in order to experience a more physiological pregnancy. If this corresponds to your values, it is essential to talk about it with your health professionals (doctor, midwife or birth attendant).
Discover our team
Varied personalities forming a dedicated team to offer you support that suits you.
Do you need support to experience this stage?
The answer is: it's your choice! Many people want to share this moment with a partner or family member. Others prefer to experience this ultrasound in privacy. This meeting is sometimes full of emotions (joy, worry, relief...), so it is normal to feel the need to be supported.
I notice through my support that feeling surrounded makes a real difference regarding stress management and the integration of this new stage.
What are the next appointments after the nuchal translucency ultrasound?
This ultrasound inaugurates an essential series of follow-ups, both medical and emotional. Here's what to expect next:
- Ultrasound of 2e quarter (around 20–22 weeks), in order to observe the anatomy of the fetus in more detail.
- The blood test for Down syndrome (often performed at the same time as nuchal translucency, or in the following days).
- Other tests as recommended by your healthcare professionals (for example, gestational diabetes screening tests or infection screening).
- Feedback on results: in some cases, one free fetal DNA test or an amniocentesis could be offered to you to go further if the risk is estimated to be high.
- Regular meetings with your birth attendant, who can personalize the information received, support choices and prepare for any eventuality.
Are there any risks associated with nuchal translucency ultrasound?
Obstetric ultrasound performed in Quebec (and worldwide) is considered a very safe examination, both for the fetus and for the mother.
No radiation or pain is associated with this examination. The risks are essentially psychological if the result turns out to be worrying or inconclusive: hence the importance of surrounding yourself well and being well supported to manage the emotions that may follow.
How to prepare mentally and physically for nuchal translucency echo?
Although the exam itself does not require any special medical preparation, being mentally ready is just as important. Here are some tips from my experience with future mothers:
📝 Don't hesitate to write down your questions in advance: this helps clarify your expectations and not forget anything on the day of the appointment.
👯♀️ Ask to be accompanied if necessary. Psychological support and the presence of someone you trust can reduce stress.
🧘🏻♀️ Remember that this examination is an orientation tool and not an absolute diagnosis.
🫂 Take the time after the exam to discuss how you felt.
Do not hesitate to make an appointment with one birth attendant for a complete debrief or simply to better understand the issues raised by ultrasound.
Finally, it is completely natural to feel apprehensive. Far from being a simple technical gesture, the encounter with nuchal translucency is also an opportunity to forge the first concrete bonds with your baby 🤱💞.
* The information presented in this article is provided for informational purposes and does not replace personalized support from a doctor. Do not hesitate to consult a health professional for advice tailored to your situation.
Remember that every pregnancy is unique
Choosing a birth attendant can make all the difference in your experience of parenting.
Find all of the services offered in preparation for birth as well as the notice families supported by the Ysé Naissance team ⭐️⭐️⭐️⭐️⭐️
