4. Intellectual Milestones are Delayed
One of the most characteristic and common traits of Down Syndrome sufferers is mental impairment; often their IQ can measure in at as much as 50 points on the scale, which means that the intellectual ability can be on-par with a small child even at adult level.
This is by far one of the symptoms of Down Syndrome that sufferers will report they feel hold them back the most, and people can often feel like this stands in their way.
This is why people who have been diagnosed with Down Syndrome often retain their childlike qualities throughout their entire lives, and why learning disabilities can also sometimes be associated with cases of Down Syndrome.
Lifelong therapy that involves enough intellectual stimulation is the most common way in which this symptom is managed for the long-term, and with the right help, many people diagnosed with Down Syndrome can lead completely independent lives.