Birth

2.5 oz.

2.75 oz.

3 oz.

3.5 oz.

4 oz.

4.25 oz.

4.5 oz.

5 oz.

5.5 oz.

1 week

4.50 

5

5.5

6

7

7.5

8

9

9.5

2 weeks

6

6.5

7

8.5

10

11

12

13 

13.5

3 weeks

7

8

8.5

10.5

13

14

15

16

17.5

4 weeks

8

9.5

10

12

14.5

16

18

20

21

5 weeks

9

11

11.5

13.5

16

18

20

22

24

6 weeks

10

12.5

13

15

17.5 

20

23

24

27

7 weeks

11

12

14.5

17

19

22

25

27

30

8 weeks

12

13.5

16

19

21.5

24

27

29

32

9 weeks

13

15

18

22

23

26

30

33

35

10 weeks

14

16

20

24

25

28

33

36

38

11 weeks

15

17

21

26

28

31

36

39

42

12 weeks

16

18

22

28

32

35

40

43

45

13 weeks

17

20

24

30

34

36

42

45

48

14 weeks

18

22

26

32

36

39

44

47

51

15 weeks

19

23

28

34

38

42

46

51

55

16 weeks

20

25

30

36

40

44

49

54

59

18 Month

2 lbs

2.5 lbs

3 lbs

3.5 lbs

4 lbs

4.5  lbs

5 lbs

5.5 lbs

6 lbs