What the 75% rule means
In Kiri, milestone ages are interpreted using a CDC milestone framing: when a skill appears at a given age, it means about 75% of children can do that skill by that age.
How parents should interpret this
It is a population benchmark, not an individual diagnosis.
Being earlier or later than the benchmark can still be normal.
Patterns over time are more important than one isolated check.
What to do if a skill is not there yet
Mark Not Yet or Not Sure honestly.
Add context in notes (illness, sleep disruption, environment, opportunities to practice).
Re-check after a reasonable window and watch for trend movement.
If concerns persist, discuss with your pediatrician.
Why this approach helps
Using a 75% milestone threshold can make expectations more practical and parent-friendly, while still helping you identify when a follow-up conversation with your pediatrician may be useful.
Important note
Kiri milestones are informational and supportive. They do not diagnose developmental conditions or replace professional clinical evaluation.
More from this section
Browse the full Milestones section for related guidance.