Table 1 Effects of feeding rumen-protected choline (RPC) during the periconceptional period on pregnancy outcomes and calving rate (Exp. 2)
Item | Control | RPC | 95% confidence limits | P-value |
|---|---|---|---|---|
Proportion of cows pregnant, % (n/n) | ||||
 Day 28 | 51.7 (47/91) | 47.0 (55/117) | 0.421–1.319 | 0.310 |
 Day 42 | 49.4 (45/91) | 43.6 (52/117) | 0.426–1.324 | 0.321 |
Proportion of cows calved, % (n/n) | 45.1 (41/91) | 41.0 (48/117) | 0.446–1.389 | 0.406 |
Pregnancy loss, % (n/n) | ||||
 Day 28–42 | 4.3 (2/47) | 5.5 (3/55) | 0.163–7.333 | 0.925 |
 Day 42-calving | 8.9 (4/45) | 7.7 (4/52) | 0.190–3.841 | 0.837 |
 Day 28-calving | 12.8 (6/47) | 12.7 (7/55) | 0.276–3.138 | 0.908 |