The disorder can also be associated with mild developmental delay and speech difficulties.
The disorder can also cause mild cognitive delays, such as delayed speech acquisition.
But that programme had been subject to mild but critical delay, and Prince Nasir could not wait.
"We would say he has a mild delay and that it's not significant," Mr. Frazier said.
Children with mild articulation problems or mild delays in language development are recommended for itinerant speech services, usually two times a week.
Twin A lacked an apparent diaphragmatic defect, and at 1 year of age had mild developmental delay.
Developmentally, tetrasomy X patients frequently show mild delays in the areas of speech development and articulation, language expression and understanding, and reading skills.
Whatever the cause, most children who exhibit mild delays turn out to be just fine.
In addition to distinguishable facial features, patients generally demonstrate shorter than average stature and general mild developmental delay.
This study also showed that 10% of infants with plagiocephaly had mild to severe mental development delay.