Table 1. Body weight during the studying period.
| Age | Tactile | Needle | P |
|---|---|---|---|
| P0 | 6.52 ± 0.08 | 6.44 ± 0.07 | 0.508 |
| P8 | 17.14 ± 0.25 | 14.82 ± 0.24 | < 0.001** |
| P15 | 32.92 ± 0.43 | 30.12 ± 0.54 | < 0.001** |
| P22 | 54.22 ± 0.68 | 52.47 ± 0.80 | 0.103 |
| P29 | 97.68 ± 1.74 | 93.61 ± 1.60 | 0.088 |
| P36 | 143.55 ± 1.36 | 140.78 ± 1.74 | 0.208 |
| P43 | 198.96 ± 2.94 | 204.90 ± 2.80 | 0.148 |
| P50 | 245.54 ± 3.27 | 244.54 ± 3.28 | 0.831 |
| P57 | 289.60 ± 3.93 | 279.52 ± 4.03 | 0.081 |
| P64 | 324.29 ± 7.29 | 318.13 ± 5.99 | 0.515 |
| P71 | 356.30 ± 7.23 | 354.75 ± 5.66 | 0.865 |
| P78 | 378.76 ± 8.30 | 377.19 ± 6.28 | 0.879 |
| P85 | 402.02 ± 9.16 | 395.04 ± 6.13 | 0.514 |
A repeated-measures univariate analysis of variance (ANOVA) model was used to compare the differences in body weight between the two groups from P0 to P85. The least significant difference (LSD) post-hoc test was used to evaluate the differences between the two groups at each age. Data are expressed as the mean ± SEM. **P < 0.01 for Needle vs. Tactile (n = 20).