Frequently Asked Questions

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You can either book an appointment further in advance, or wait to see if there are any cancellations. If you are pregnant and you will be over 11 weeks pregnant by the time of the next available appointment, please email and we will try our best to accommodate your needs.

No. The test is suitable if you have Ashkenazi, Sephardi/Mizrahi or mixed ancestry. Our test was updated in September 2021 making it suitable for all parts of the community, not just those with Ashkenazi Jewish origin.

Yes. As of September 2021, the test was updated to include 48 severe recessive disorders (this total includes Fragile X Syndrome, a prevalent X-linked recessive disorder, for which screening is offered as an option for female clinic participants only) Previously we covered 9 ‘Ashkenazi’ disorders on our test. The new test includes disorders relevant for both the Ashkenazi and Sephardi/Mizrahi community

With the continual advancements in genomic medicine and Jewish genetic disorder research, we can not rule this out. However, the timing and nature of a future expansion can not be predicted

We strongly recommend couples to take part in the clinic together, however we will accept those wanting to take part individually.Testing a couple simultaneously avoids the anxiety and time-loss associated with waiting twice, should one partner be identified as a carrier first.

Having both sets of results at once, allows the couple to have all the information needed for the best decision-making and a personalised risk assessment. The price for testing as a couple is £350, while the price for testing as an individual is £250.

The price for testing as a couple is £350, while the price for testing as an individual is £250. We encourage, as far as possible, participation as a couple. If you are interested in screening but are unable to afford the subsidised screening costs, please contact us at as there may be an option to offer some limited financial assistance.

Currently, only Tay-Sachs is covered by the NHS for the Ashkenazi Jewish community. The other conditions covered in the Jnetics screening test are not available on the NHS unless you have an established family history of a particular condition. In this case, your GP can refer you to a Regional Genetics Service for disorder-specific carrier testing where appropriate.

No. Paying is a central part of the online registration process.

If you are running late, we ask that you inform us by emailing both and We will still try and fit in your screening but if  it is likely you may need to wait until other participants have finished their appointment.

If you have booked but are unable to attend, please email as soon as possible to enable your slot to be re-assigned. A full refund will be given up to 48 hours before your appointment was scheduled– after this, the refund will have £25 taken off for late administration costs.

This test detects the vast majority of all genetic changes in the genes covered. However, this test, as with all genetic tests, can not detect all possible changes. The screening test detects over roughly 95% of carriers in the Jewish population with detection rates varying slightly across the different conditions.

If you suspect that you have at least one Jewish grandparent, it is still sensible to be tested. This is because if you have some Jewish, you will have an increased risk relative to the general population, though this will be lower than people of full Jewish descent.

Although it is advisable to have carrier screening prior to pregnancy, testing is possible if you are already pregnant. However, if you will be over 11 weeks pregnant by your appointment date then please contact us at to enable us to discuss with you the implications and options available for screening in later stage pregnancy.

It is not a problem if you have recently given birth or are currently breast feeding, you can still be screened.

Even if you already have healthy children, it is possible that future children could be affected by a Jewish genetic disorder if both partners are carriers for the same disorder. If you are considering expanding your family then testing is still relevant.

The Jnetics test identifies carriers of 47 (or 48)  conditions in one go (prior to September 2021, the test covered 9 disorders). However, if you do have a family history of a particular Jewish genetic disorder, your GP can refer you to a Regional Genetics Service to see if you are eligible for disorder specific carrier screening. 

Jnetics screening services do NOT include screening for BRCA mutations. However, if you are concerned about cancer in your family and would like more information about how to access BRCA screening if appropriate, please contact

Providing a saliva sample involves spitting in to a saliva collection kit. The process is very straight forwards. Participants must remember not to eat, drink (even water), smoke or chew gum 30 minutes prior the their appointment.

You will receive your results from the Jnetics genetic counsellor via email within 8-10 weeks of the screening event. You will receive these whether or not you are found to be a carrier.

The results of your carrier screening test will be delivered directly to the Jnetics genetic counsellor at Northwick Park Hospital who will only share the results with you. The results of your test are strictly confidential and will not be shared with any additional parties unless you request otherwise.

Where both partners are carriers of the same disorder-causing mutation for a recessive condition, there will be a 1 in 4 chance of having an affected child. If you and your partner are both identified as carrier for the same disorder, our genetic counsellor will provide you with all the follow-up information, support and referrals required.

You will have the opportunity to discuss your results with a dedicated Jnetics genetic counsellor. The implications of being a carrier are only significant if your current or future partner is also a carrier of the same condition. In this situation it will be possible to make an appointment with a genetic counsellor to discuss the different options available to reduce the risk of having an affected child.

There should not be any ramifications of being a carrier of a recessive condition with regard to any kind of insurance.

Some insurance companies may cover the cost of the Jnetics carrier screening test, however you will need to check with your individual provider directly. If you would like a service receipt from Jnetics, please contact us at and we will be happy to provide you with one.