Figure 3From: Milk yield responses to changes in milking frequency during early lactation are associated with coordinated and persistent changes in mammary gene expressionMammary cell apoptosis. Percentage of apoptotic A. epithelial or B. stromal cells in mammary tissue of cows (n = 6) assigned to unilateral frequent milking (UFM; twice daily milking (2×) of the left udder half, four times daily milking (4×) of the right udder half) for days 1 to 21 of lactation. Mammary biopsies from both udder halves were obtained on d 21, 23, and 40 of lactation. Each bar represents Least Squares mean ± pooled standard error. Mammary cell apoptosis was not affected by 4× milking or by day of lactation (P ≥ 0.30).Back to article page