Hi, My sister is 28 years old this year. Not Down Syndrome. But she has one chromosome which is slightly shorter. Doctors called her condition 'Slow Learner'. I am not too sure what s the exact medical term. Hard to pick up stuffs in school. Went to special school till she is 21. Now she helps my mom full time at home. Also help looks after my baby. She looks like she is 12 years old. Small size. Very very attached to my mom.