Windows of Achievement
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Age in months
M
o
to
r
M
ile
st
o
n
e
WHO Child Growth Standards
Sitting without support
Standing with assistance
Hands-&-knees crawling
Walking with assistance
Standing alone
Walking alone
