Developmental Milestones

Development is a continuous process that begins at conception and proceeds stage by stage in an orderly sequence. There are specific milestones in each of the six areas of development (cognitive skills, gross motor skills, fine motor skills, language skills, social development and self-help skills) that serve as prerequisites for the stages that follow. Most children are expected to achieve each milestone at a designated time, also referred to as a "key age," which can be calculated in terms of weeks, months or years. Because of specific challenges associated with Down syndrome, babies will likely experience delays in certain areas of development. However, they will achieve all of the same milestones as other children, just on their own timetable. In monitoring the development of a child with Down syndrome, it is more useful to look at the sequence of milestones achieved, rather than the age at which the milestone is reached.

MilestoneRange for Children with Down SyndromeTypical Range
Gross Motor
Sits Alone6 - 30 Months5 - 9 Months
Crawls8 - 22 Months6 - 12 Months
Stands1 - 3.25 Years8 - 17 Months
Walks Alone1 - 4 Years9 - 18 Months
Language
First Word1 - 4 Years1 - 3 Years
Two-Word Phrases2 - 7.5 Years15 - 32 Months
Social/Self-Help
Responsive Smile1.5 - 5 Months1 - 3 Months
Finger Feeds10 - 24 Months7 - 14 Months
Drinks from Cup Unassisted12 - 32 Months9 - 17 Months
Uses Spoon13 - 39 Months12 - 20 Months
Bowel Control2 - 7 Years16 - 42 Months
Dresses Self Unassisted3.5 - 8.5 Years3.25 - 5 Years

 

References

The information featured in this section is reproduced via an exclusive arrangement with National Down Syndrome Society [ONLINE] Available at http://www.ndss.org