Fig. 7

The comparison results of the thickness of the gastric wall at various stages between gastric specimens and 3D figures in Fig. 6 and gastric specimens after dehydration and drying. a The thickness of the gastric wall of the specimens is significant increased from 0.71 ± 0.04 mm to 0.99 ± 0.05 mm, 1.33 ± 0.32 mm about 28.28% (p < 0.001, n = 7), 46.61% (p < 0.001, n = 7) in the 4 weeks, 6 weeks and 12 weeks postnatal, respectively. And the thickness of gastric walls was calculated as shown in Fig. 6, with a marked enhancement from 0.62 ± 0.024 mm to 1.13 ± 0.02 mm, 1.34 ± 0.04 mm about 45.13% ( p < 0.001, n = 7) and 53.73% (p < 0.001, n = 7). All the data at the same stage have no difference. Data represent mean ± S.E.M. (^***P < 0.001, P < 0.001, ^▲▲▲P < 0.001). ^***4-week-old vs 6-week-old, 4-week-old vs 12-week-old, ^▲▲▲6-week-old vs 12-week-old. b The thickness of gastric wall tends to decrease from 0.71 ± 0.044 to 0.62 ± 0.05 mm by 4.6% (p > 0.05, n = 7) in the 4 weeks models, from 1.00 ± 0.05 to 0.90 ± 0.04 mm by 9.6% (p>0.05, n = 7) in the 6 weeks models, and from 1.33 ± 0.08 to 1.210 ± 0.06 mm by 9.12% (p> 0.05, n = 7) in the 12 weeks models, respectively. These results showed that the gastric shape and structure unchanged, and the thickness of gastric wall decreased proportionally less than 10% within the credible range of no difference