CDC's Milestone Tracker funktioniert nicht

From birth to age 5, your child should reach milestones in how he or she plays, learns, speaks, acts and moves. • Milestone Photos and Videos -- due to previous social distancing restrictions, photos and videos to support the updated milestones have been delayed, but will be added in a future update. * This milestone checklist is not a substitute for a standardized, validated developmental screening tool.  Track your child’s milestones from age 2 months to 5 years with CDC’s easy-to-use checklists; get tips from CDC to support your child’s development; and find out what to do if you ever have concerns about your child's development.  CDC has released updated milestones and two new checklists (15 and 30 months) to better support your child’s development*.  Subject matter experts selected these milestones based on available data and expert consensus.  These developmental milestones show what most children (75% or more) can do by each age.  Existing app users can find their checklist history on the homepage under “View Checklist History”.  Milestones matter!  CDC does not collect or share any personal information that can be used to identify you or your child.