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Table 5 Number of days from calving to first insemination, number of days open and number of AI until conception for all cows in treatment groups A, B and C.

From: Effects of a single administration of prostaglandin F2alpha, or a combination of prostaglandin F2alpha and prostaglandin E2, or placebo on fertility variables in dairy cows 3–5 weeks post partum, a randomized, double-blind clinical trial

Calving to first insemination

all cows

Group of cows without CL

p-value

A

65 ± 24

62 ± 18

all cows: p = 0.306

without CL:

p = 0.034

B

68 ± 23

71 ± 20

 

C

64 ± 19

67 ± 16

A-B: p = 0.024*

A-C: p = 0.406*

B-C: p = 0.953*

Days open

   

A

95 ± 46

93 ± 44

all cows: p = 0.947

without CL:

p = 0.802

B

97 ± 49

98 ± 45

 

C

100 ± 53

97 ± 44

 

Number of AI until conception

   

A

1.8 ± 1

1.7 ± 0.9

all cows: p = 0.582

without CL:

p = 0.915

B

1.8 ± 1

1.7 ± 1

 

C

1.9 ± 1.2

1.7 ± 1

 
  1. A is (PGF + E2), B is placebo and C is PGF alone (mean ± SD) for all cows and group of cows without CL. Level of significance is p = 0.05 and with Bonferroni adjustment p < 0.017. * indicates the p-values for pairwise group comparisons of cows without CL.