Nuchal translucency is the name for the normal fluid space behind the neck of a foetus unborn baby that can be seen on ultrasound scans. A nuchal translucency scan also called first trimester of pregnancy screening is carried out during weeks 11—13 of a pregnancy. The scan uses ultrasound to screen for Down syndrome, or other chromosomal or inherited conditions in the foetus. Other non-chromosomal conditions, such as neural tube defects, abdominal wall defects, limb abnormalities and some congenital heart disease, can also be detected at this stage of the pregnancy. Screening can determine the likelihood of risk of an abnormality, but does not diagnose the condition. If screening does identify a possible risk, it does not necessarily mean there is an abnormality present, but does mean that further testing is necessary. Women who return a high-risk result from the screening will be offered formal genetic testing using other procedures, such as amniocentesis or chorion villus sampling CVS.
Early pregnancy scan (booking or dating scan)
ARC Forum Contact us. Ultrasound scans have been used in antenatal care for over thirty years and there is no evidence to suggest that they are harmful to you or your baby. Most women whose pregnancy is progressing without complications will be offered a maximum of two to three scans in their pregnancy. Most scans are performed by a sonographer, who is the healthcare professional trained to use the ultrasound equipment, to take measurements of your baby and to check for major anomalies.
Sonographers are not specialists in obstetrics or fetal medicine, so if something is found you will usually be referred to someone with specialist knowledge.
At a dating scan, the sonographer will check if there is more than one baby and of fluid at the back of the baby’s neck called the nuchal translucency or NT.
The test suggests which pregnancies are at a higher risk of abnormality and may need further investigation. Alongside the scan we require you to have a blood test at least three working days prior. The pathology results and the scan measurements are used together to provide your report. We require you to have a full bladder during this scan.
Please drink ml of water one hour before your appointment and try your best not to empty your bladder. If you think you will find this difficult, please talk to us at the time of booking.
Nuchal translucency (NT) scan
See Appendix 5: Non-invasive prenatal screening for more information. Skip to main content. Indications Dating of pregnancy Early anatomy assessment Detection of multiple pregnancy chorionicity and amnionicity Screening for chromosomal anomalies and other conditions. Required clinical details LMP Any symptoms Previous relevant maternal or family history History of previous caesarean section.
Ultrasound examination TA scan is usually adequate.
Guidance for screeners on the 12–13+6 week scan from the New Zealand anatomy scan and may include NT assessment as part of combined screening for Dating of pregnancy; Early anatomy assessment; Detection of.
Editor —I would like to address two issues raised by Venn-Treloar in her comments about screening for nuchal translucency without the consent of the mother. However, I would argue that an inspection for fetal anomalies, including measurement of nuchal translucency, generates such a diagnosis. Patients presenting for ultrasound scanning expect the operator to perform a detailed examination to confirm fetal health.
The benefit of early diagnosis of fetal anomalies is that information can be provided to enable couples to consider various options and to allow appropriate plans to be made for treatment and follow up. Outcome depends on the recognition of the potential severity of defects; these defects fall into four groups. In lethal conditions, such as anencephaly, the couple may wish to consider the options of terminating or continuing the pregnancy.
In disorders that are not lethal but are associated with death, such as diaphragmatic hernia, planned delivery in a centre with appropriate neonatal intensive care facilities will optimise neonatal outcome. In abnormalities that are associated with childhood morbidity such as hydronephrosis, and which may lead to renal failure due to urinary tract infections, prenatal diagnosis provides the opportunity for early postnatal treatment.
In the case of chromosomally abnormal fetuses where there is a risk of physical and mental handicap, the couple may wish to continue the pregnancy or undergo termination. Therefore, examining for increased nuchal translucency, which is associated with an increased risk for aneuploidy, 2 is an essential component of first trimester ultrasound assessment.
Your care during pregnancy
We welcome your views on our website and invite you to take part in a brief survey when you’ve finished your visit. A nuchal translucency scan NT is an ultrasound scan that helps determine the likelihood of Down’s syndrome and other chromosomal abnormalities in unborn babies. It is a non-invasive procedure so doesn’t carry a risk of miscarriage.
The chance of having a baby with the condition is one in 1, for women who are 20 years old, rising to one in for women who are 30 years old, and one in for women who are
So the NT scan will usually happen alongside your routine dating scan. It’s difficult to do the scan before 11 weeks because your baby is still so small. It would also.
There are a number of tests and scans available to you during your pregnancy. The nuchal translucency scan is an ultrasound that may detect the risk of a number of chromosomal abnormalities. A nuchal translucency scan is part of the ultrasound scan that most pregnant women have at around 12 weeks of pregnancy. The results of a nuchal translucency scan may tell you if your baby has a high or low risk of a chromosomal abnormality.
Examples of chromosomal abnormalities include trisomy 21 Down syndrome , trisomy 18 Edwards syndrome or trisomy 13 Patau syndrome. The results will tell you if your baby is at high risk or low risk of chromosomal abnormality in comparison to the general population. The nuchal translucency scan is done between 11 and 14 weeks of pregnancy. Usually the scan is done through your abdomen but occasionally the nuchal translucency can only be seen by inserting a probe into the vagina.
You might also be offered a blood test around this time. Your doctor can look at the results of the combined test blood test and nuchal translucency scan to get a more accurate picture of the risk of a chromosomal abnormality. The results of the nuchal translucency scan will not be used alone to calculate the risk of a chromosomal abnormality. All your first trimester screening is combined to calculate your risk.
12 week pregnancy dating scan: here’s what to expect
Baby Connections is a private obstetric ultrasoun scanning centre at St Joseph’s Hospital with experienced sonographers. We offer a complete range of obstetric packages giving you the reassurance at all stages of your pregnancy. We perform early pregnancy scans, gender determination, 4D and late presentation scans. You are embarkign on a life changing journey.
Nuchal translucency scan. Nuchal translucency (NT) is the sonographic appearance of a collection of fluid under the skin behind the fetal neck in the first-trimester.
Back to Your pregnancy and baby guide. All pregnant women in England are offered an ultrasound scan at around 8 to 14 weeks of pregnancy. This is called the dating scan. It’s used to see how far along in your pregnancy you are and check your baby’s development. Your midwife or doctor will book you a dating scan appointment. It will usually take place at your local hospital ultrasound department.
The person performing the scan is called a sonographer. You may need to have a full bladder for this scan, as this makes the ultrasound image clearer. You can ask your midwife or doctor before the scan if this is the case. Find out more about what happens during a pregnancy ultrasound scan. They will advise you about what to do.
3.2 Nuchal Translucency Assessment
Normal babies accumulate fluid under the skin behind the head and neck between 9 and 14 weeks of pregnancy, however, excess fluid has been associated with chromosome abnormalities such as Down syndrome. The Nuchal Translucency NT tends to be larger in a baby that might be affected by a chromosome abnormality and it can be compared with what is expected for a baby of the same size NT Normal Range. The assessment of these elements age, blood, scan combined give us a comprehensive understanding of the likelihood of your baby being affected by a chromosome abnormality.
The levels can be assessed from a simple blood test taken from you either before or on the same day as the Nuchal Translucency ultrasound is performed. The results can be compared to the expected results in a pregnancy at the same gestational age. We recommend having your 12 — 14 week scan at the same time, there are many benefits to this scan including:.
Women who are unsure of their dates are recommended to have a dating scan before the screening test. Who performs the scan? The nuchal translucency scan is.
Log in Sign up. Pregnancy All Pregnancy Antenatal health. Community groups Birth Clubs Labour and birth tips Twins or more Pregnant with second, third or more! I’m pregnant! See all Pregnancy groups. Home Pregnancy Antenatal health Antenatal scans.
NT Scan (Nuchal Scan)
This combined test is an extremely accurate non-invasive screening test available to help identify a fetus at risk for Down syndrome as well as other chromosomal abnormalities and some major structural abnormalities. The sensitivity of this only recently eclipsed by NIPT. An ultrasound screening test is non-invasive and does not have any side effects or complications.
The only way to diagnose Down syndrome or other chromosomal abnormalities is by having a diagnostic test — either a CVS or an amniocentesis — and testing the fetal cells. These tests are invasive and require a needle to be passed into the maternal abdomen and uterus and therefore carry a small risk of miscarriage. Many patients do not wish to have the diagnostic test because of the small risk of miscarriage and prefer to have the ultrasound screening test, the NT scan, to help them decide if they wish to proceed to testing the fetus.
Nuchal Translucency Scan – This is also offered to pregnant mums at the same time as the Dating Scan. This assesses the risk of Down Syndrome in babies.
Our team have taken new measures to decrease the risk of the spread of the virus. Our Centre is cleaned between each and every appointment. If you or your loved ones have a high fever or new continuous cough. We advise you not to attend our scan centre if you or your family are at high risk of developing or passing the virus on.
An early pregnancy scan can help provide you with peace of mind and find out for certain how your pregnancy is progressing. This test is non-invasive involving an ultrasound scan then a simple and safe blood test from the mother’s arm. NIPT test for the detection of genetic diseases such as trisomies, sex chromosome aneuploidies and microdeletions.
12 Week Nuchal Translucency Scan and Blood Test
The main purpose of a dating scan is to check the stage of pregnancy and therefore when the baby is due. Measuring the baby can be more accurate than dating by the last menstrual period. It is also an opportunity to check the baby is alive and developing as expected, and check for twins. This scan may also be part of your screening test for Down’s syndrome nuchal translucency scan.
Occasionally, if the baby is in an awkward position, an internal scan may be carried out, using a vaginal probe. We spoke to a few women who had experienced this.
This scan is carried out from 11 weeks to 13 weeks and six days. Confirm baby’s gestational age and corresponding due date; Scan for major abnormalities.
OHSU brings you safe, excellent care — in person and in virtual visits. Call your clinic or see MyChart for details. This scan is carried out from 11 weeks to 13 weeks and six days. The scan is usually performed transabdominally but in a few cases it may be necessary to do the examination transvaginally. Nuchal translucensy NT is the clear space in the tissue of your developing baby’s neck. An NT measurement can help your healthcare practitioner assess your baby’s risk of having down syndrome and some other chromosomal abnormalities as well as major congenital heart problems.
Major abnormalities may be visible at this gestation. We will check whether your baby has all its limbs, that the head and brain appear to be developing normally, that the baby has a visible stomach and bladder and the umbilical cord is inserted correctly. From 12 weeks the spine can usually be seen clearly enough to rule out major cases of spina bifida.
Your pregnancy – What to expect
Now comes the moment when you might get to see your baby for the first time — the week scan. We run through what scans are and what to expect on the day. This is often just called a scan.
They can then enter your age or date of birth in a computer program to calculate the risk of your baby having an abnormality. An NT scan cannot.
A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. Most dating scans are done with a trans-abdominal transducer and a fullish bladder. If the pregnancy is very early the gestation sac and fetus will not be big enough to see, so the transvaginal approach will give better pictures. Dating scans are usually recommended if there is doubt about the validity of the last menstrual period.
By 6 to 7 weeks gestation the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage 90 to beats per minute under 6 to 7 weeks, then to beats per minute as the baby matures. Ultrasounds performed during the first 12 weeks of pregnancy are generally within 3 – 5 days of accuracy.
The most accurate time is between 8 and 11 weeks gestation. This is because the fetus is growing so quickly that there is a big difference in size from week to week. However, the accuracy of the ultrasound examination is always dependent on the skill of the sonographer and the quality of the equipment.