Weeks

Mean ± SD (SL)

Mean ± SD (Intergrowth)

8

19.06 ± 2.32

9

26.19 ± 2.87

27.47 ± 4.83

10

35.48 ± 4.14

36.33 ± 6.10

11

46.44 ± 5.34

49.39 ± 6.62

12

58.95 ± 6.62

60.78 ± 7.07

13

71.59 ± 5.95

72.53 ± 7.29