Table 3.
Predicted model parameters based on parity and stage of gestation
| Day of gestation, d | |||
|---|---|---|---|
| 5 to 39 | 40 to 74 | 75 to 109 | |
| Weight of conceptus, kg1 | |||
| Parity 1 | 0.4a ± 0.22 | 10.5bx ± 0.22 | 24.3cx ± 0.22 |
| Parity 2 | 0.4a ± 0.25 | 11.2bx ± 0.25 | 25.9cy ± 0.25 |
| Parity 3+ | 0.4a ± 0.21 | 12.3by ± 0.21 | 28.3cz ± 0.21 |
| Maintenance requirement, kcal2 | |||
| Parity 1 | 4,620ax ± 20.0 | 5,114bx ± 20.0 | 5,640cx ± 20.0 |
| Parity 2 | 4,859ay ± 23.0 | 5,194by ± 23.0 | 5,563cy ± 23.0 |
| Parity 3+ | 5,387az ± 19.0 | 5,702bz ± 19.0 | 6,076cz ± 19.0 |
| Energy retention of conceptus, kcal3 | |||
| Parity 1 | 20.5a ± 2.16 | 122.9bx± 2.16 | 328.3cx ±2.16 |
| Parity 2 | 22.4a ± 2.48 | 132.4by ± 2.48 | 352.9cy ± 2.48 |
| Parity 3+ | 23.7a ± 2.05 | 141.0bz ± 2.05 | 376.8cz ± 2.05 |
| Energy used for maternal protein deposition, kcal4 | |||
| Parity 1 | 275ax ± 1.6 | 229bx ± 1.6 | 210cx ±1.6 |
| Parity 2 | 258ay ± 1.9 | 211by ± 1.9 | 190cy ± 1.9 |
| Parity 3+ | 228az ± 1.6 | 186bz ± 1.6 | 163cz ± 1.6 |
| Maternal protein deposition, g5 | |||
| Parity 1 | 48ax ± 0.3 | 40bx ± 0.3 | 37cx ± 0.3 |
| Parity 2 | 45ay ± 0.3 | 37by ± 0.3 | 33cy ± 0.3 |
| Parity 3+ | 40az ± 0.3 | 33bz ± 0.3 | 29cz ± 0.3 |
| Energy used for maternal lipid deposition, kcal6 | |||
| Parity 1 | 928ax ± 20.2 | 463bx ± 20.2 | −244cx ± 20.2 |
| Parity 2 | 1,510ay ± 23.2 | 1,170by ± 23.2 | 531cy ± 23.2 |
| Parity 3+ | 1,070az ± 19.2 | 830bz ± 19.2 | 171cz ± 19.2 |
| Maternal lipid deposition, g7 | |||
| Parity 1 | 98ay ± 2.1 | 49bx ± 2.1 | −26cx ± 2.1 |
| Parity 2 | 159ax ± 2.5 | 123by ± 2.5 | 56ay ± 2.5 |
| Parity 3+ | 113az ± 2.0 | 87by ± 2.0 | 18cx ± 2.0 |
A total of 712 females (Camborough, PIC, Hendersonville, TN) are used in a 108-d trial with 249, 188, and 275 females in parity groups 1, 2, and 3+. Values with different superscripts within a rowabcde or columnxyz differ, P < 0.05. The mean, per period of gestation, for each variable is reported.
1Weight of conceptus (kg/d) = Final conceptus weight at d 114 (kg) × % of final conceptus weight.
2Maintenance requirement (kcal/d) = (440 × BW0.75)/4.184.
3Energy retention of conceptus (kcal/d) = (Final energy content of conceptus at d 114 (kJ) × % of final energy content of conceptus)/4.184.
4Energy used for maternal protein deposition (kcal/d) = (23.8 × 6.25 × (NR – NRc))/4.184.
5Maternal protein deposition (g/d) = (ERmp/23.8).
6Energy used for maternal lipid deposition (kcal/d) = ((Intake, kJ/d – (MEm + ERc/kc + ERmp/kp)) × kf)/4.184.
7Maternal lipid deposition (g/d) = (ERmf/39.7).