An Irish baby, whose parents are the carriers of an extremely rare disease, is the first in the world to be born healthy as a result of a revolutionary treatment.

Emma and John O'Connor are both carriers of mucolipidosis.

There is a one-in-four of chance of inheriting the disease - their first child was born with it, but their second was not.

To avoid risk they underwent Pre-implantation Genetic Diagnosis treatment (PGD) with their third child.

Megan was born free of the disease last month as a result.

Dr John Waterstone is the medical director of Cork Fertility Centre, where he treated the O'Connor's.

He told Newstalk Breakfast it is in the government's interest to provide funding for the treatment.