Postnatal day

Control group (n = 16)

Experimental group (n = 23)

2

6.56 ± 0.81

6.48 ± 0.67

8

17.25 ± 1.73

14.0 ± 1.94*

p = 0.000019

20

36.5 ± 1.83

33.17 ± 3.21*

p = 0.000105