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Private Blood Tests London at The Scan Clinic

SneakPeek® Early Gender Test

4.8 (Google Rating)Results in 1-2 WeeksWhat's included?
Blood Testing
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Blood Results



How to find us

The Scan Clinic London East,

635A Cranbrook Road,

Gants Hill IG2 6SX

Call the scan clinic

Call us on:

0203 904 7706

Monday – Saturday 9am – 5pm


Biomarkers Included with the SneakPeek® Early Gender Test blood test

Scroll down for more information about each biomarker

SneakPeek NIPT

About the SneakPeek® Early Gender Test blood test

Having a baby is one of the most memorable times of your life and can be one of the most hectic to prepare for. Knowing if you’re having a boy or girl early can help you plan ahead and encourage bonding between mother and baby.

This is why we have partnered with SneakPeek a leading and well established genetic laboratory based in the USA to offer their SneakPeek blood test, giving you the best possibility to determine your babies gender from 7+ weeks gestation. As SneakPeek labs are based in the USA, we are able to help collect blood sample for you to send to SneakPeek.

The main objective of this blood test is to determine fetal sex / gender based on genetic information in the mothers blood.

How is the SneakPeek test performed?

The process is very straightforward and follows the steps outlined below.


  1. You must be at least 7 weeks pregnant with a positive pregnancy test – please contact our customer care team (links below) to book in for the test.
  2. The blood sample is taken using the SneakPeek sample kit – The blood test is just like a routine blood test. You will be asked to uncover your left or right arm and suitable vein is found. A tourniquet will be placed and tightened around your upper arm allowing the veins to swell and a needle will be placed into your vein. A small quantity of blood is then drawn into tubes. Once the procedure is complete a small plaster will be placed onto the site which can be removed after a few hours.
  3. The sample kit will be packaged together for you and placed in a Royal Mail – Tracked (postage paid,) sealed envelope. You will need to take this to your local post office who will be send this to SneakPeek labs in the USA. (Note: keep hold of the receipt from the post office as this will contain tracking information).

What if I have any questions or concerns with the SneakPeek test?

Common test related questions can be answered on the sneakpeek FAQ page, link for this can be found by clicking here. However for anything further please contact SneakPeek directly by clicking here.

Important Note: 

As we are only taking the blood sample for the test,  we are not involveded in any of the testing or results and cannot help in the interpretation of the results or with any questions or concerns relating to the results. Any such concerns need to be addressed with SneakPeek directly – details with links are above.

How does the SneakPeek test work?

Every pregnant mother to be will have her own DNA in her bloodstream as well as the DNA of your unborn baby. Your babies DNA is found in your blood in the form of short fragments circulating around called cell-free DNA fragments (cfDNA) and this test can analyse this cfDNA to determine the sex of your baby.

The way this is done is first we need to understand how biological sex is determined in men and women. We all have a pair of sex chromosomes present in each cell in our bodies. Men carry one X chromosome and one Y chromosome; whereas Women have two X chromosomes. When analysing your babies cfDNA for the Gender Test, the goal is to detect the presence of the male – Y Chromosomes. If the male – Y chromosome is detected, this would indicate that your baby is likely to be Male. If no Y Chromosome is present, this would indicate the baby is likely to be Female.

How accurate is the SneakPeek test?

Our laboratory partner have performed a large clinical study of 1,029 pregnant women (link below) and this has shown the accuracy of the test as 99.9% accurate at 7 weeks into pregnancy.

How and When will I get my results?

The results of your test will be emailed to you within 7-10 working days after the day you you’re your blood sample taken directly from sneakpeek

I am having twins – Can I still do the SneakPeek Test?

Yes, you can have the sneakpeek test for twins however the test cannot determine if you are having identical or non-identical (fraternal) twins.

The reason this is important is If you are having identical twins (i.e. both babies are boys or girls) then the result of the test (i.e. boy or girl) will apply to both babies.

However if you are having non-identical twins (i.e. one boy and one girl)  then the test cannot determine the sex of each baby and so if the male chromosome is detected then this means that at least one of the babies is a boy and the second baby could be a boy or a girl.

If you are really keen to know then it may be worthwhile have one of our ultrasound scans to assess the sex of each baby.

I’ve had a boy before. Will that affect the accuracy of my results?

No, this won’t be a problem. Clinical studies show that your babies DNA clears out of the mother’s bloodstream within 2 days of birth.

Important Information

  • No specific preparation is required for the blood test however you must be at least 7 weeks pregnant
  • The test requires you to be at least 7 weeks into the pregnancy to generate a results. If the test concludes you are under 7 weeks a result can not be generated and a redraw of your blood will be required charged at £15 per redraw. If you are uncertain of your dates or want to confirm how far along we suggest you book our early pregnancy scan. 
  • There is small probability that SneakPeek are not able to get a valid result from the sample taken, this is normal and can occur with any type of laboratory testing. As SneakPeek is a non-medical and non-diagnostic test you can be assured this does not relate to the health and development of your baby. In situations where you receive an inconclusive result then we can perform one single repeat sneakpeek test free of charge. If you would not like a retest then we can provide a refund amount equal to the amount you paid minus a £20 blood collection/ phlebotomy charge.
  • This test will not diagnose, prevent, or treat any condition, disease or used to ascertain the state of your health or the health of the pregnancy and that you understand that the services and information provided by the test are intended for research, informational, and educational purposes only and not medical advice.
  • Please click here to access the clinical study performed by sneakpeek.
  • Our pregnancy scan/ services do not replace or substitute any service/scan you have or will have with the NHS / maternity care provider.

Why choose us?

We are a multi award winning clinic based in London, with awards from Whatclinic clinic of the year, GHP outstanding patient care and LUX best private ultrasound provider to name a few. Our clinical lead Mr. Usman is well known and respected in the industry and has been featured in the Huffington Post and performed scans live on ITV.

We pride ourselves on providing the best quality service we can which is why we are trusted by GP's, doctors, physiotherapists, midwives and many other healthcare professionals.

Our mission of better quality healthcare for everyone is at the heart of everything we do and drives us to do the best we can for each and every patient that we see. Our team of experts have years of experience and are fully registered and regulated meaning you are in safe hands with us.

Biomarker information for SneakPeek® Early Gender Test blood test

This blood test includes the biomarkers shown below along with information about each biomarker.
SneakPeek NIPT

While every person has her own DNA in her bloodstream, a pregnant woman’s bloodstream also contains DNA from her unborn child. SneakPeek looks for male chromosomes in a small sample of mum’s blood. If male chromosomes are found, that means baby is a boy. If none are found, baby is a girl. SneakPeek is 99.9% accurate at 6 weeks into pregnancy.

At SneakPeek Labs, a test process called non-invasive prenatal testing (NIPT) is used to analyse cell-free fetal DNA. Starting with a small sample of blood from mum, plasma is separated from whole blood by centrifuge, and extracted cell-free fetal DNA (cffDNA) is analysed for Y chromosomes, which are found only in males. The SneakPeek test is sensitive enough to find even a single Y chromosome, giving you confidence in your results

This can affect or useful or:

What does the SneakPeek® Early Gender Test blood test involve?

This blood test is just like a standard blood test.

You will be asked to uncover you left or right arm and suitable vein is found. A tourniquet will be placed and tightened around your upper arm allowing the veins to swell and a needle will be placed into your vein. A small quantity of blood is then drawn into tubes. Once the procedure is complete a small plaster will be placed onto the site which can be removed after a few hours.

How do I prepare

  • The blood test requires access to the area of interest, therefore, it is recommended to wear loose clothing to facilitate this process.
  • No specific preparation is required for this scan.

Our Reviews

HCT iBusHCT iBus
11:46 02 Dec 23
A great service that delivers in a clean and friendly safe environment that delivered exactly what... we needed for our peace of mind. Really expert information and friendly service from start to finish. Will recommend to all friends and more
Candice UghaonuCandice Ughaonu
11:28 03 Oct 23
Great team and the Doctor was super friendly, very detailed and reassuring. He answered all my... questions and concerns. I left feeling much better. I have used them many times and will use again if required in future. Definitely recommend!read more
Gemma KGemma K
11:39 22 Jul 23
I came here for my first child’s gender reveal 3 years ago and the treatment hasn’t changed. The... service is still amazing, the doctors and staff were so welcoming and kind. The doctor took his time to explain the scan to me and checking the baby. The facility is very soothing and relaxing. What an amazing team. May God bless themread more
15:18 12 Jul 23
I recommend this clinic from my heart , the doctor and assistent was so kind and they make me feel... very confortable while on the procedure , nothing to complain, everything perfect . I will go to this clinic again if i will need it for sure .read more
Violeta GugleaVioleta Guglea
17:16 17 Jun 23
I have used the this clinic at the recommendation of my friend who had a positive experience. I... have used this clinic looking for reassurance before my gallbladder removal operation. The appointment was quickly booked for the next day to suit my needs. The scan was performed by a very well spoken, professional person. The whole experience was very positive, as expected from a private clinic. From the experience I have had, I can highly recommend this more
aditya gandhiaditya gandhi
16:08 12 Nov 22
Today me & my wife had 2nd visit of scan clinic. I must say our both visit of scan clinic are much... satisfactory. We were welcomed by miss Zeenat. She was very polite and professional throughout. Scan performed very well & explained as well. Scan clinic deserves thumbs more
ruth raeruth rae
15:21 07 Sep 22
I booked an early scan here and I had a great experience. All the staff were amazing and friendly.... The Sonographer was great, really made me feel at ease. I would highly recommend this more
Tiziana MonnoTiziana Monno
08:10 18 Aug 22
Beautiful experience! I was 31 weeks pregnant and a little worried about my little girl's position.... I was so patiently confirmed by the doctor and informed us of the growth. My partner and I were more than satisfied. Professionalism and kindness they made me feel more
Lina ZhangLina Zhang
10:55 16 Aug 22
I've been to this clinic 4 times over the past 7 years for both pregnancy scans and health scans.... What sterling services they consistently provide! Booking is always easy either online or over the phone, minimum waiting time, and calming environment. What's most impressive is that Mr Usman always explained the scan results thoroughly in a calm and professional way on site and in a report, and quickly spotted issues that both my hospital scan and community clinic scan completely missed (the sonographer at the hospital even asked where I did my scan as she was impressed)! This helped me eventually get timely referral and free from lots of stress. I always feel being well looked after by the team and will wholehearted recommend them to anyone who is looking for efficient, caring and professional more
sannndra Ruizsannndra Ruiz
09:25 06 Aug 22
Great treatment, it's the second time we've been here and we plan to repeat the whole pregnancy.... They revealed the gender of the baby in week 16 and the doctor is super careful and delicate, a 10 out of more

Important Notes

  • We will require details of your GP / Health Care Professional, which may be requested before or at the time of the scan.
  • Blood results require interpretation. All results should be interpreted by your regular health care professional / GP.

Fact Check Information

The Scan Clinic is committed to providing accurate and objective educational content about health and medical related topics. We know that there is a lot of misinformation out there, and we take our responsibility to be a trustworthy source of information seriously. Every article on our site is thoroughly fact-checked by our team of writers.

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