Minimum liveweights of weaner heifers

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This tool provides a guide to minimum liveweights of weaner heifers at puberty, at mating when 15 months of age, during pregnancy and at calving.

Frame score LW at puberty Mating LW at
15 months
LW at 0–3 months pregnancy LW at 4–6 months pregnancy Calving LW at
24 months
Mature LW at
60 months
1 Jersey 240 260 296 319 333 400
2 British 270 300 342 369 387 470
3 Limousin, Devon 290 330 377 409 430 530
4 Simmental 310 365 419 454 478 600
5 Charolais 340 400 459 499 525 670
LW = liveweight
Subtract up to 10kg for crossbred females.
Source: adapted from Laster et al., 1972 J Anim Sci 34(6): 1031–1036 and Patterson et al., 1992 J Anim Sci 70(12): 4018–4035.