Plasma B12 before initiation of the experiment
(4 d before insemination) was similar among treat-
ments (P > 0.10; Table 3). During gestation, plasma
B12 tended to increase by 9% in S+ sows and to decrease by 12% in S− sows (sow treatment × time; P =
0.078; Table 3). During lactation, plasma B12 on d 22
was greater in S+ sows than in S− sows (P < 0.05;
Table 3).