Field trials show that ROVIMIX® ß-Carotene improves fertility in dairy cows (Table 1 and 2). Besides  more intensive signs of heat and increased fertility rate, cows showed a reduction in early embryonic losses and abortions, and a reduction of cystic ovaries when supplemented ROVIMIX® ß-Carotene.

Effect of ROVIMIX® ß-Carotene on fertility rate
in dairy cows (Aréchiga et al., 1998)
 

 
 Fertility rate
   
Interval from calving to 1st insemination
1st Insemination
90 d pp
120 d pp
   
days
% pregnant cows
Control
77
9.3
9.4
21.1
ß-Carotene 400 mg/d for >90 days
79
14.6
12.9
35.4*
*p<0.05
 
 
 
 
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Fertility problems in dairy cows
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Field trial results
 

Effect of ROVIMIX® ß-Carotene on fertility

 
   
Control
+ 400 mg
ß-Carotene/
hd/d
Time between 1. heat and ovulation
Days
2.3
1.6
Conception rate
1. Insemination
2. Insemination

%
%

40
55

68
90
Early embryonic losses (until 7th week of pregnancy)

%
31
0
Abortions (week 18–20 of pregnancy)
%
12
0
Cystic ovaries
%
30
0
Meyer et al., 1975; Lotthammer et al., 1976 & 1978