However, the experimental design (Zahra et al. 2006) supplementation of other diets (Davidson et al. 2008) application methods (Ardalan et al. 2010) animals breed (Sales et al. 2010) quantity of supplements, length of experiment or duration and phase of lactation of dairy cows significantly affect the RPC supplementation and milk production or milk properties (Guretzky et al. 2006).
Six multiparous ruminally fistulated cows (BW = 685 ± 65 kg; (mean ± SD) in the mid-phase of lactation (70 to 148 DIM) received the following treatments in a replicated 3 × 3 Latin square design: (1) total mixed ration (TMR; control, CON), (2) TMR + 2 g/head per day of a probiotic combination of Enterococcus faecium and Saccharomyces cerevisiae (EFSC), or (3) TMR + Prevotella bryantii 25A.
Therefore, it is possible that the MSCs are shed into HBM in the earlier phase of lactation, but may not be present later on when lactation becomes established.
Establishing reference values for dairy cows in the correct phase of lactation is a challenge.
During this phase of lactation, the milk becomes rich in protein and lipids with a reduction in the concentration of carbohydrates [ 33].
During the early phase of lactation (Phase2A, ~100 days), the young is permanently attached to the teat and the mother secretes dilute milk with a low concentration of protein and lipids but a high concentration of complex carbohydrates [ 31].
GR mRNA expression was detected in the CA1 and DG (but not in CA2 and CA3) and in both of these subfields, expression also varied significantly with the phase of lactation and weaning (CA1 P <.011; DG P <.012).
Marsupial ELP expression is limited to the early phase of lactation [ 13, 20, 21, 27, 28] at the time the mother produces milk for an immunologically naïve young [ 29, 30].
Insulin-like growth factor binding 1 (isF1) is considered an anabolic hormone and plays a pivotal role in mammary development [ 45] and potentially in maintaining the epithelial cells during the declining phase of lactation [ 46].
