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Table 1 Distribution of number and proportions of inseminations, days from calving to first observed ovulatory oestrus, oestrus intensity (2 = weak and 4 = strong), number and proportions of detected oestruses and number and proportions of false inseminations per ovulation number for Swedish dairy cows

From: Extent and pattern of pregnancy losses and progesterone levels during gestation in Swedish Red and Swedish Holstein dairy cows

 

Ovulation number

1

2

3

4

≥ 5

Inseminations, n (%)

70 (3.3)

370 (17.4)

524 (24.6)

439 (20.6)

727 (34.1)

Day of first observed ovulatory oestrus, mean (SD)

46 (29)

67 (33)

92 (34)

117 (34)

166 (45)

Oestrus intensity, mean (SD)

2.21 (1.34)

2.91 (0.73)

2.93 (0.67)

2.94 (0.68)

2.97 (0.68)

Detected oestruses, n (%)a

657 (75)

614 (77)

686 (83)

541 (87)

911 (89)

False inseminations, n (%)b

9 (11.4)

17 (4.4)

21 (3.9)

12 (2.7)

25 (3.3)

  1. aNumber and proportion of visible oestrous observations out of oestruses based on low P4 concentration
  2. bInseminations performed with high P4 concentration (numbers and proportions out of total number of inseminations)