Figure 4.

The effect of day and colostrum treatment on the proportion of parenchyma composed of epithelial tissue and percent epithelial and stromal cell proliferation index. (A) Proportion of parenchymal tissue composed of epithelium (parenchymal epithelial area; PEA) and (B) percent of epithelial and stromal cells in parenchymal compartment stained with KI67 as a marker of proliferating population in mammary tissue of baseline (n = 6; gray) animals collected immediately after birth and in neonatal piglets fed 10% (COL10; n = 7; black) or 20% (COL20; n = 6; white) of birth weight of colostrum over the first 24 h postnatal, returned to sow to suckle and then euthanized on day seven postnatal. Within the boxplot, the ‘x’ indicates mean, and line indicates median. Different letters indicate a significant difference at p < 0.05.