explaining that they report like the rest of the people and feel sexual arousal but do not know the way to express it which may cause incomplete marriage according to the difference in the degree of intelligence of affected cases including smart and mediumintelligence and limited intelligence pointing out that healthy children can not have children in the event of marriage except by 1 what do we know about down syndromedownton syndrome means intellectual disability caused by abnormal division in cells which leads to an increase in total or partial copies of chromosome 21 most children with down syndrome suffer from moderate to medium delayed delayed language and affected by short and long term memorythe syndrome vary in severity among the injured which causes mental and educational disability and delay in lifelong growth as it often causes other medical anomalies including heart and digestive disorders