Genomics England – The Generation Study – CAH included
The Generation Study is being carried out by Genomics England in partnership with the NHS. It is exploring the possible use of genome sequencing in newborn babies to identify a wide range of rare genetic conditions alongside the routine newborn blood spot screening. The study will include 100,000 newborns and the first participants are expected to join the study in the next few weeks.
As part of the study, Genomics England have created a list of rare conditions and associated genes that they will be looking for – and CAH is included. These conditions are chosen by following four key principles.
An extract of the list showing the types of CAH which are included is below:
| Condition Group | Gene | Condition name |
| Congenital adrenal hyperplasia | CYP17A1 | 17-alpha-hydroxylase/17,20-lyase deficiency |
| Congenital adrenal hyperplasia | CYP21A2 *This gene meets the principles to be included, however it is not currently being analysed due to further internal work being required | Congenital adrenal hyperplasia due to 21-hydroxylase deficiency |
| Congenital adrenal hyperplasia | CYP11B1 | Adrenal hyperplasia, congenital, due to 11-beta-hydroxylase deficiency |
| Congenital adrenal hyperplasia | HSD3B2 | Adrenal hyperplasia, congenital, due to 3-beta-hydroxysteroid dehydrogenase 2 deficiency |
The list is being kept under constant review throughout the study and is subject to change as new evidence emerges. Genomics England is working with the NHS in England to ensure availability of treatments and to confirm that the genome sequencing technology used in the study can reliably identify changes in the genes causing these conditions.
The results of the study will add to evidence that will inform future decisions on using whole genome sequencing to support newborn screening. This includes using it to accelerate diagnosis and access to treatments for rare conditions.
More information
Genomics England homepage – https://www.genomicsengland.co.uk/
The Generation Study – https://www.genomicsengland.co.uk/initiatives/newborns
Recent Blog Posts
Patient Survey: Improving the Delivery of Genetic Results
CAH is a rare genetic condition and many of us will have received results of genetic testing at some point on our CAH journey. When you received these reults might not have been at the best time - pehaps you received genomic test results while you were driving, on...
Webinar: Finding Your Way – A Parent’s Guide to Rare Disease
Join the NHS South East Genomic Medicine Service and Unique on Wednesday 16th September 2026 at 12-1pm on Teams to celebrate the launch of “Finding Your Way: A Parent's Guide to Rare Disease”. Written by parents, for parents, this new guide offers practical support,...
New report highlights access gap for innovative medicines
The CAH Support Group recently provided input into a new Medicines Australia report about access to innovative medicines in Australia. The report, now published, warns that Australian patients are missing access to some innovative medicines available in comparable...