Body condition at calving and heat after calving(change)
BCS at Calving |
Number of Cows |
Percent in Heat Post calving |
60 days |
90 Days |
Thin-5 |
272 |
46 |
66 |
Moderate- 6 |
364 |
61 |
92 |
Good-7 |
50 |
91 |
100 |
Body weight gains (lbs) required in pregnant cows from 100 to 200 days prior to calving
BCS Weaning |
BCS needed at Calving |
Calf and Placenta Weight |
Body Weight Gain |
Total Gain |
Days to Calving |
ADG(lbs) |
3 |
5 |
100 |
160 |
260 |
120 |
2.2 |
4 |
5 |
100 |
80 |
180 |
120 |
1.5 |
5 |
5 |
100 |
0 |
100 |
120 |
0.8 |
3 |
5 |
100 |
160 |
260 |
200 |
1.3 |
3 |
5 |
100 |
160 |
260 |
100 |
2.6 |
*pounds to change BCS in moderate frame cows
Table adapted from Corah et al., 1991. Kansas Cooperative
Extension Service C-817
Condition and Rebreeding Performance
Item |
Condition Score at Calving |
|
4 |
5 |
6 |
7 |
Numbers of cows |
25 |
59 |
80 |
23 |
Pregnant first 20 days of breeding, % |
4 |
13 |
36 |
65 |
Pregnant first 60 days of breeding, % |
24 |
51 |
69 |
87 |
Michigan State University Extension
Effect of body condition at calving (going to change)
|
% Cycling by |
Body Condition |
50 Days after calving |
70 days after calving |
90 days after calving |
1-3 |
34 |
55 |
66 |
4-6 |
45 |
79 |
92 |
7-9 |
42 |
96 |
100 |
University of Georgia College of Agricultural & Environmental Sciences
Effect of body condition during breeding season on pregnancy (Sprott, 1985)
Body Condition During Breeding |
|
4 or less |
5 |
6 or more |
Number of Cows |
122 |
300 |
619 |
% Pregnant after 150 days |
58 |
85 |
95 |
University of Missouri- Columbia
Effect of body condition score on cows in heat at the start of breeding season
|
Days after Calving |
|
60 days |
90 days |
BCS at Calving |
Cows in Heat (%) |
Thin (3-4) |
46 |
66 |
Optimum(5-6) |
61 |
92 |
Table adapted from Whittier and
Stevens, 1993. Missouri Cooperative
Extension Service G2230
Effect of condition score on percentage of cows cycling
Body Condition |
Number of Cows |
May |
June |
July |
Early Calving Cows: Late March-Early April |
Condition prior to calving 4 |
45 |
10.0 |
28.2 |
70.5 |
5 |
84 |
17.8 |
43.5 |
85.6 |
6 |
43 |
41.9 |
77.5 |
97.5 |
7 |
25 |
45.9 |
76.6 |
94.7 |
Late calving cows: Late April |
Condition prior to calving 4 |
14 |
0.0 |
0.0 |
44.7 |
5 |
41 |
0.0 |
26.0 |
74.4 |
6 |
22 |
7.5 |
65.0 |
91.1 |
7 |
6 |
0.0 |
65.8 |
91.1 |
Corah, 1989a.
Predicting body weight gains in nursing cows in several Body Conditions
BCS |
Body weight gain needed for breeding |
At Calving |
Needed at Breeding |
Total Pounds Needed |
Days to Breeding |
ADG(lbs) |
3 |
5 |
160 |
80 |
2.0 |
4 |
5 |
80 |
80 |
1.0 |
5 |
5 |
0 |
80 |
0 |
3 |
5 |
160 |
60 |
2.7 |
3 |
5 |
160 |
40 |
4.0 |
*pounds to change BCS in moderate frame cows
Table adapted from Corah et al., 1991. Kansas
Cooperative Extension Service C-842
Relationship of Body Condition Score and Parity to Pregnancy rate,%
Parity |
Body Condition Score |
|
<3 |
4 |
>5 |
All |
1 |
20 |
53 |
90 |
84 |
2 |
28 |
50 |
84 |
71 |
3 |
23 |
60 |
90 |
85 |
4-7 |
48 |
72 |
92 |
87 |
>8 |
37 |
67 |
89 |
74 |
All |
31 |
60 |
89 |
82 |
South Florida Beef- Forage Program
Relationship of body condition score at calving to subsequent pregnancy rate in three studies
|
Percent Pregnant |
BCS |
Study A |
Study B |
Study C |
4 |
50 |
17 |
59 |
5 |
81 |
67 |
67 |
6 |
88 |
80 |
87 |
7 |
90 |
|
|
University of Georgia College of Agricultural & Environmental Sciences
Weight change needed to reach optimum condition
BCS 100 days before calving |
Percent of cows in heat after calving at: |
Pounds of TDN per day
|
60 days |
90 days |
BCS 1-3 |
46 |
66 |
12-15 |
BCS 4-6 |
61 |
91 |
9-10 |
BCS 7-9 |
91 |
100 |
6-7 |
BCS 100 days before calving |
Description of Condition |
Weight Change needed |
1 |
Emaciated |
Gain 350 lbs. |
2 |
Very Thin |
Gain 300-350 lbs. |
3 |
Thin |
Gain 200-300 lbs. |
4 |
Borderline |
Gain 150-200 lbs. |
5 |
Moderate |
Gain weight of fetus only (100 lbs.) |
6 |
Moderate-Good |
Gain weight of fetus only (100 lbs.) |
7 |
Fleshy |
No weight gain needed |
8 |
Fat |
Could lose 100 lbs. |
9 |
Obese |
Could lose 150 lbs. |
University of Missouri- Columbia