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10 Week Scan

SMART NT Step One:
Combining the earliest structural screening for most severe anomalies with precise NT measurement in a single scan

How it works

Chat with our Genetic Counsellor, receive your at-home DNA kit with a quick cheek swab, send it back, and get your results in under 4 weeks.

2-5 days

Typical turnaround time for results

Fast lab processing means most parents receive their results within a few working days.

£540

All-inclusive cost

Includes the PrenatalSafe 3UK test, secure sample collection, analysis, and a consultation with a Jeen genetic counsellor.

>99%

PrenatalSafe Detection rate for Down’s, Edwards’ and Patau’s syndromes.

Conditions like Trisomy 21, 18, and 13 can occur even without family history. Screening helps identify risk early in pregnancy.

1 in 671*

Pregnancies are affected by the conditions screened by PrenatalSafe.

*This number is based on UK prevalence data for conditions screened by PrenatalSafe NIPT.

Scan + NIPT

One-stop 10 Week Scan + NIPT. If iNT (NT ≥2.5 mm; CRL <45mm) is found, we recommend proceeding with KNOVA. If NT is normal, KNOVA is optional; we advise to discuss basic versus advanced NIPT and choose according to context and preference.

NT + anomalies

Apart from measuring NT, the 10-week scan can reveal lethal non-genetic anomalies and features suggestive of a genetic condition. Lethal non-genetic anomalies are NIPT exclusion criteria; when findings suggest a genetic cause, KNOVA is the preferred screen.

iNT ≥ 2.5 mm

NT ≥ 2.5 mm at 10 weeks is abnormal

According to recent data, an NT measurement of 2.5 mm or greater at 10 weeks is associated with an abnormal fetal outcome in about 42% of cases. This cut-off has been adopted in our protocol, and any measurement at or above this level triggers the SMART NT pathway. It is important to note that this value is higher than the 95th centile for this stage of pregnancy, which is typically 2.1–2.4 mm.

"Genetic" anomalies

Genomic NIPT can be beneficial

Alobar holoprosencephaly, heart defects, limb abnormalities, exomphalos with liver, and particularly early fetal hydrops or cystic hygroma are strongly associated with chromosomal or genetic syndromes. At later stages, these findings usually warrant diagnostic testing (CVS); however, CVS cannot be performed safely at 10 weeks. In such cases, we recommend starting with a genomic NIPT as the first step. A high-chance NIPT result, especially for monogenic conditions, can help guide the planning of further diagnostic tests.

"Non-genetic" anomalies

SMART NT protocol is contraindicated

Acrania, body stalk anomaly, cloacal exstrophy, pentalogy of Cantrell, sirenomelia, amniotic band syndrome, and limb–body–wall complex are usually NOT associated with genetic conditions. Most of these anomalies are lethal or have an extremely poor outcome. If such conditions are detected at 10 weeks, we strongly recommend NOT proceeding with NIPT, as performing it may delay appropriate referral and management, and a low-risk result could provide false reassurance.

SMART NT exclusions

Genomic NIPT - NOT eligible cases

The SMART NT protocol cannot be used in certain situations where genomic NIPT (KNOVA) is not applicable. These include early not genetic fetal anomalies, twin or triplet pregnancies, vanishing twin, donor egg IVF pregnancies. Maternal ineligibility includes cases where the mother has a history of recent cancer, organ or bone marrow transplantation. In such cases, the fetal cfDNA in the mother’s blood cannot be accurately analysed, making genomic NIPT unreliable.

How SMART NT works

NT scan and NIPT at 10 weeks; full results by 12 weeks

1

Book 10 Week Scan & NT

If increased NT is found, you can have the SMART Test straight away

1

Book 10 Week Scan & NT

If increased NT is found, you can have the SMART Test straight away

2

Get KNOVA NIPT

Receive genetic results in two weeks

2

Get KNOVA NIPT

Receive genetic results in 2 weeks

Step 01

Ultrasound Scan + NIPT

Step 02

Target Scan after NIPT results

2

Anomaly Scan after Results

Top-to-toe expert fetal examination

Talk to our Team

Frequently
Asked Questions

How is 10 Week Scan done?

At this early stage the baby is very small, so the scan is usually done through the vagina (transvaginal) to get the sharpest images. The transvaginal probe sits closer and uses higher-frequency sound, giving better resolution for tiny structures including the NT.

We can scan through the tummy (transabdominal) if the view is good, but detail is often lower because the beam travels further and is partly absorbed by the abdominal wall; we’ll use whichever gives the best view—both are safe.

Why ultrasound before NIPT?

We scan first to confirm NIPT is appropriate. Several early major anomalies like acrania, amniotic band syndrome, body-stalk anomaly, cloacal exstrophy, limb–body–wall complex, pentalogy of Cantrell, and sirenomelia, are usually non-genetic with a very poor prognosis.

In such cases NIPT adds no value, risks false reassurance, and may delay urgent referral, so we recommend fetal medicine referral instead. This will avoid unnecessary cost and delay, especially for genomic NIPT.

Can I have carrier screening if I’m already pregnant?

Mostly yes, you can have carrier screening during pregnancy - depending on how far along you are. Ideally, carrier screening is done before conception so you have more time and options, but it’s still valuable if you’re already pregnant.

If you’re found to be a carrier during pregnancy, we may recommend testing your partner too. If both partners carry the same gene variant, there’s a 1 in 4 (25%) chance the baby could inherit the condition. Our genetic counsellors will support you through the next steps.

Is carrier screening accurate?

Yes, carrier screening is highly accurate at detecting known gene variants associated with inherited conditions. However, no test is 100% perfect, it’s possible, though rare, to be a carrier for a very rare or unknown variant not covered by the test.

At Jeen Health, we use advanced laboratory techniques and clinically validated panels to provide the most accurate results possible. Your results are interpreted by specialists to ensure they’re meaningful and reliable.

Can I have carrier screening if I’m already pregnant?

Mostly yes, you can have carrier screening during pregnancy - depending on how far along you are. Ideally, carrier screening is done before conception so you have more time and options, but it’s still valuable if you’re already pregnant.

If you’re found to be a carrier during pregnancy, we may recommend testing your partner too. If both partners carry the same gene variant, there’s a 1 in 4 (25%) chance the baby could inherit the condition. Our genetic counsellors will support you through the next steps.

How long does it take to get results?

Results usually take 3-4 weeks from when your sample reaches our lab. We’ll keep you updated and book a follow-up consultation to explain your results once they’re ready.

If further testing is needed for your partner, we’ll move quickly to support you and keep the process smooth. Our aim is to give you answers without delays, so you can plan your next steps with confidence.

What is the cost of carrier screening tests in the UK?

The cost of carrier screening in the UK can vary depending on how many conditions are tested and whether the screening is tailored to your background or family history. At Jeen Health, our tests start from £400, which includes the test kit, lab analysis, and a pre test consultation with one of our genetic counsellors.

Unlike the NHS, which only offers limited screening in specific cases, private testing gives you access to a wider range of conditions and more personalised support. It’s a one-time investment that can provide valuable insight into your family’s genetic health and help you make informed decisions about your future.

Who should consider carrier screening?

Carrier screening is recommended for anyone planning a pregnancy or currently expecting, especially if there's a family history of genetic conditions or if you come from an ethnic background with higher risks of certain inherited diseases. However, even people with no known history can be carriers without knowing it.

It’s particularly helpful for couples who want to make informed decisions about starting a family. Carrier screening can provide peace of mind or allow you to explore options like IVF with genetic testing, egg or sperm donation, or early diagnosis and support if you decide to conceive naturally.

How is the test done?

Carrier screening can be done easily and painlessly. Most people use an at-home saliva kit, collecting a cheek swab with a soft swab in just a few minutes. In some cases, depending on your location and test type, a blood sample may be required, this can be arranged either at our partner Spital Clinic in London or through a home phlebotomy visit.

Once your sample reaches the lab, your DNA is analysed to check for specific gene variants linked to inherited conditions. Our expert team will review the results, and you'll receive a detailed report along with a follow-up consultation to walk you through what it means for you and your family.

What happens if I’m found to be a carrier?

If you’re a carrier, it means you have one copy of a gene variant linked to a particular condition. You won’t usually have symptoms, but if your partner is also a carrier for the same condition, there’s a risk of passing it on to your child.

Our genetic counsellors will talk you through your results and what they mean. Depending on your partner’s results and your family plans, you may consider further testing, reproductive options, or simply keeping this information in mind for the future.

What happens if I’m found to be a carrier?

If you’re a carrier, it means you have one copy of a gene variant linked to a particular condition. You won’t usually have symptoms, but if your partner is also a carrier for the same condition, there’s a risk of passing it on to your child.

Our genetic counsellors will talk you through your results and what they mean. Depending on your partner’s results and your family plans, you may consider further testing, reproductive options, or simply keeping this information in mind for the future.

Do both partners need to get tested?

It’s ideal for both partners to be tested, but we usually start by testing one. If that person is not a carrier, no further testing is needed. If they are, then their partner should be tested to check for the same condition.

This step-by-step approach helps keep testing straightforward and cost-effective. Our team will guide you based on the results and help you understand your reproductive risks together.

Is carrier screening covered by the NHS?

Carrier screening is available on the NHS in specific situations, such as if you or your partner are from certain ethnic backgrounds or have a known family history of a particular condition. However, comprehensive screening for multiple conditions is not routinely offered.

Jeen Health provides private carrier screening with the support of expert genetic counsellors. This gives you access to broader testing, at your convenience, from the comfort of your home.

What are X-linked conditions?

X-linked conditions are genetic disorders caused by changes in genes found on the X chromosome — one of the two sex chromosomes. Since males only have one X chromosome (and one Y), if they inherit a gene variant on the X chromosome, they’re more likely to be affected by the condition. Females have two X chromosomes, so if one carries a faulty gene, the other can often compensate, which means women are usually carriers without symptoms.

Some common X-linked conditions include Duchenne muscular dystrophy and fragile X syndrome. If you’re a female carrier of an X-linked condition, there’s a 50% chance of passing the gene to each child. Sons who inherit it are more likely to be affected, while daughters may become carriers like you.

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