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Clarification of the concept of nuchal transparency

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Clarification of the concept of nuchal transparency.

🩺 Preparation for the examination of the occipital transparency and the need to fill the bladder.

⏰ When and how important is the nuchal transparency test done at weeks 11-14?

📊 Interpret the results of the nuchal translucency examination and their importance.

🧬 Address the potential risks of testing and the possibility of miscarriage.

💡 Directions for pregnant women considering screening or avoiding it.

What is nuchal transparency?

An examination to measure the thickness of the skin behind the neck of the fetus and the amount of fluid is performed in the first months.

Helps detect birth defects and genetic disorders such as Down syndrome

Preparation for the examination

It is advisable to drink enough water to fill the bladder before the examination.

There may be a little discomfort but it is safe.

When is the test performed?

It takes place from week 11 to 14 of pregnancy.

Not conducted after week 14.

Test results

It helps to know the thickness of the normal skin of the fetus.

Results are highly correct, but there is a possibility of false positives.

Additional tests can be requested to verify the results.

Risks and preparations

Screening helps in early detection of disorders and preparation for fetal care.

It can contribute to better decision-making and equipping medical staff.

Avoid or perform screening

Some women may not prefer screening due to lack of need or stress.

Results can be just information without affecting decisions.

Understanding the Nuchal Transparency Test During Pregnancy

Every expectant mother strives to ensure her baby's health and development throughout pregnancy. Detecting any possible abnormalities or chromosomal abnormalities is crucial. To address this concern, many women choose to have different tests. One such test is the nuchal transparency test, which helps assess the likelihood of a healthy birth or the presence of genetic disorders such as Down syndrome.


What is nuchal transparency?

Nuchal translucency is a screening test done during the first months of pregnancy, usually between weeks 11 and 14. It involves measuring the thickness of the skin behind the neck of the fetus and the accumulation of fluid in that area. Thickening of the skin and fluid accumulation are associated with fetal abnormalities such as congenital heart defects and chromosomal disorders, including Down syndrome.


Exam Preparation:

When undergoing a nuchal translactation test, it is recommended that the pregnant woman's bladder is comfortably full. Doctors often recommend drinking two to three glasses of water about an hour before the test and refraining from using the bathroom before the exam. You may feel some discomfort due to pressure on your bladder during the ultrasound, but the procedure is generally painless.


Test procedure:

During the test, the doctor applies a gel to the mother's abdomen and uses an ultrasound machine to measure the thickness of the skin behind the baby's neck and fluid buildup. In some cases, if vision is limited, the doctor may ask the mother to perform the test through the vagina. This difference is safe and should not cause undue anxiety.


Test timing:

A nuchal translucency test is usually done between weeks 11 and 14 of pregnancy. Before week 11, the fetus is too small to measure accurately, and after week 14, the fetus absorbs any excess fluid behind the neck. However, if the test is not done before week 14, a similar evaluation known as "occipital transparency of the neck" can be performed in the second trimester to ensure fetal health.


Interpretation of the results:

The test doesn't provide a diagnosis, but it does provide valuable information. Natural differences exist in skin thickness and fluid accumulation. For example, a fetus with Down syndrome may show different measurements. A positive result indicates a higher risk of genetic disorders, but further diagnostic tests such as amniocentesis or chorionic villus sampling may be necessary to confirm. It is important to note that these follow-up tests carry a small risk of miscarriage.


The nuchal transparency test provides early insights into potential concerns about fetal health, allowing mothers and medical professionals to prepare for baby care. Although it is not mandatory, it serves as a proactive step towards ensuring a healthy pregnancy and making informed decisions for both mother and baby.

Nuchal translucency examination is an important tool for early detection of birth defects and genetic disorders in the fetus. It takes place between 11 and 14 weeks of pregnancy and contributes to the preparation of the mother for a better reception of the fetus. The examination can be avoided or performed according to the needs of each woman.


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