Parameters

Group A

Group B

p-value (2-sided)

Age of cows (years)

5 (3/6)

4 (3/5)

0.162

Number of cows/farm

19 (14/30)

20 (15/28)

0.895

Yearly milk yield/cow (kg)

6800 (6500/7000)

6500 (6300/7000)

0.181

Duration of pregnancy (days)

290.5 (286/295)

291 (283/294)

0.344

Treatment p.p. (hours)

20 (12/24)

18 (12/24)

0.862

Calving to 1st insemin. (days)

77 (58/104.5)

82 (66.5/96)

0.722

Number of AI’s

1 (1/2)

1 (1/2)

0.588

Days open

89 (65/128)

96 (71/120)

0.566