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Table 2 Birth weights (kg) (no. records, mean, mean + 2SD, range) and gestation length (Ges, days) of fullterm (260–300 days), singleton (n = 10,422) and twin (n = 615) calves of different breeds and crossbreeds

From: Investigation of bovine abortion and stillbirth/perinatal mortality - similar diagnostic challenges, different approaches

Dam genotype Sire genotype Singletons Twins
No. records Birth wt. mean Birth wt. mean + 2SD Birth wt. range Ges. days No. records Birth wt. mean Birth wt. mean + 2SD Birth wt. range Ges.
days
Jersey, JerseyX Jersey, JerseyX 200 26.21 16.54–35.88 14–45 281.15 6 21.83 10.92-
32.74
15–30 284.66
Jersey, JerseyX or dairy Jersey, JerseyX or dairy 919 32.63 20.31–44.95 14–51 280.34 32 26.63 22.04-
31.22
15–34 277.87
Dairy (excl. Je, JeX)a Dairy
(excl. Je, JeX)
7960 41.84 29.61–54.07 11 to 76 281.62 496 34.14 23.18–45.1 18–55 277.02
Dairy
(excl. Je, JeX)
Beefb 1343 42.82 30.86–54.78 18–63 283.6 81 35.07 22.45–47.69 21–51 278.86
  1. aDairy (excl. Je, Jex) = Holstein-Friesian, Friesian, Friesianx, Ayrshire, Norwegian Red, Norwegian Redx, Swedish Red,
  2. Swedish Redx, Montbeliarde, Montbeliardex, Normande, Normandex
  3. bBeef = Aberdeen Angus, Belgian Blue, Blonde D’Aquitaine, Charolais, Hereford, Limousin, Simmental
  4. Source: Teagasc dairy research herds