Interesting article on the BBC Web site.
The number of conditions for which newborn babies in England are screened is to increase.
All babies born in the UK are already tested for common genetic conditions such as cystic fibrosis.
Now four additional, rarer disorders will also be checked for in the heel-prick blood test.
A year-long pilot study found 20 cases of the diseases in 700,000 babies tested.
Experts said it proved carrying out these tests could make an “enormous difference” to the children concerned and their families.