Infants with untreated PKU appear to develop typically for the first few months of life, but by twelve months of age most babies will have a significant developmental delay and will be diagnosed with mental retardation before school entry.
(Infants with untreated PKU; appear; ) (Infants with untreated PKU; to develop typically; T:for the first few months of life) (most babies; will have; a significant developmental delay; T:by twelve months of age) (most babies; will be diagnosed; with mental retardation; T:before school entry; T:by twelve months of age)
Infants with untreated PKU Infants with untreated PKU most babies most babies
appear to develop typically will have will be diagnosed
T:for the first few months of life
a significant developmental delay T:by twelve months of age
with mental retardation T:before school entry T:by twelve months of age