4 6 8 10 12 14 16

6 meses 9 meses 12 meses 18 meses 2 3 4 5 6 7 8

2 4 6 8 10 12 14

4 6 8 10 12 14 16

2 4 6 8 10 14

12 14 16 0/2 4/6 8/10

2/4 6/8 10/12 14/16