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Table 1 Descriptive statistics by herd (mean, with SD in parentheses where appropriate)

From: The creation and evaluation of a model to simulate the probability of conception in seasonal-calving pasture-based dairy heifers

  Research Herds Commercial Herds  
1 2 1 2 3 4 5 6 7 8 9 10
Years 10 10 5 5 5 4 5 5 4 5 4 4
Herd size 42.80 (20.44) 26.60 (21.87) 40.20 (6.06) 11.00 (7.35) 29.80 (9.58) 15.50 (2.89) 14.40 (4.93) 12.00 (5.52) 17.50 (4.20) 28.80 (3.56) 16.25 (6.85) 9.00 (6.00)
Services per lactation 1.27 (0.52) 1.33 (0.65) 1.24 (0.47) 1.18 (0.47) 1.20 (0.43) 1.29 (0.55) 1.31 (0.52) 1.20 (0.40) 1.06 (0.23) 1.10 (0.30) 1.14 (0.39) 1.42 (0.77)
Service conception rate (%) 76.94 (42.16) 73.24 (44.33) 90.76 (29.01) 61.54 (49.03) 72.63 (44.71) 68.75 (46.64) 60.64 (49.12) 88.89 (31.65) 85.14 (35.82) 87.34 (33.36) 78.38 (41.45) 80.39 (40.10)
In calf within 84 d (%) 95.53 (5.59) 97.16 (4.05) 94.32 (3.87) 59.43 (42.01) 78.46 (9.23) 85.30 (11.31) 77.34 (21.08) 89.33 (15.35) 86.57 (10.30) 92.40 (2.71) 88.69 (13.93) 94.64 (6.84)
Age at service (d) 447 (30) 455 (45) 440 (33) 537 (79) 464 (58) 488 (57) 475 (61) 445 (18) 493 (68) 461 (61) 518 (53) 463 (72)
Monthly services (%)
 April 65.65 50.30 37.18 50.00 32.14 26.58 63.22 32.35 5.63 48.05 63.89 40.00
 May 27.70 36.14 61.54 7.81 56.55 41.77 22.99 66.18 80.28 50.65 27.78 31.11
 June 5.88 12.05 1.28 32.81 10.12 18.99 13.79 1.47 14.08 1.30 8.33 24.44
 July 0.76 1.51 0.00 9.38 1.19 12.66 0.00 0.00 0.00 0.00 0.00 4.44