0-3 M = New Born, 1 M and 2 M for ages

3-6 M = 3 M, 4 M and 5 M for ages

6-9 M = 6 M, 7 M and 8 M for ages

9-12 M = 9 M, 10 M and 11 M for ages

12 M = 1 for ages