Table 5 Litter production at different first mating days of 35,847 gilts

160-189

9.9 ± 0.10^a

9.1 ± 0.11^a

7.9 ± 0.13^ac

190-219

10.1 ± 0.03^a

9.3 ± 0.04^ac

7.9 ± 0.04^a

220-249

10.5 ± 0.03^e

9.6 ± 0.03^d

7.8 ± 0.04^ac

250-279

10.7 ± 0.09^d

9.8 ± 0.03^e

7.9 ± 0.05^ac

280-309

10.3 ± 0.03^a

9.2 ± 0.05^ac

7.7 ± 0.06^bc

310-339

10.3 ± 0.06^a

9.3 ± 0.07^ac

7.9 ± 0.08^ac

340-369

10.8 ± 0.11^de

9.6 ± 0.14^acde

8.1 ± 0.17^ac

370-399

9.3 ± 0.16^bc

8.4 ± 0.18^b

7.3 ± 0.21^ac

≥400

9.5 ± 0.13^bc

8.4 ± 0.18^b

7.7 ± 0.21^ac