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Table 2 Least square means (SE) for early embryonic loss, late embryonic loss, foetal loss and total pregnancy loss for Swedish Red (SR) and Swedish Holstein (SH) cows

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

Effect

Total nobs

Early embryonic loss (%)

Late embryonic loss (%)

Foetal loss (%)

Total pregnancy loss (%)

Breed

 SR

1343

29.1 (2.72)

13.5 (1.98)

12.4 (1.66)

62.4 (2.85)a

 SH

786

28.8 (2.92)

15.2 (2.10)

13.7 (1.76)

67.9 (3.02)b

Parity

 1

893

30.5 (3.04)

14.5 (2.04)

11.8 (1.68)a

58.7 (2.94)a

 2

620

28.0 (3.119)

13.7 (2.22)

11.9 (1.82)a

64.1 (3.20)b

 ≥ 3

616

28.4 (3.21)

14.9 (2.22)

15.4 (1.84)b

72.6 (3.18)c

Calving interval (months)

 12

1390

30.8 (2.56)

13.4 (1.86)

14.9 (1.56)a

66.3 (2.68)

 15

739

27.2 (3.12)

15.2 (2.27)

11.2 (1.90)b

64.0 (3.26)

Ovulation number

 1

70

34.8 (6.16)ab

12.3 (4.40)

16.2 (3.53)ab

67.7 (6.36)

 2

370

32.1 (3.30)a

15.7 (2.42)

10.5 (1.98)a

67.1 (3.50)

 3

524

27.7 (2.98)ab

15.7 (2.19)

11.0 (1.80)a

64.3 (3.15)

 4

439

26.9 (3.03)ab

14.5 (2.23)

12.9 (1.82)ab

63.1 (3.20)

 ≥ 5

726

23.3 (2.62)b

13.6 (1.91)

14.6 (1.59)b

63.6 (2.74)

Housing

 Tie-stall

911

30.5 (2.15)

12.6 (1.50)

9.4 (1.26)

62.1 (2.16)

 Loose-housed

1130

28.5 (1.95)

13.0 (1.38)

8.0 (1.16)

60.3 (1.99)

Insemination season

 January–April

1022

30.5 (2.68)a

14.0 (1.95)

10.3 (1.61)a

64.6 (2.81)

 May–September

532

25.0 (3.12)b

14.6 (2.24)

17.4 (1.85)b

68.4 (3.23)

 October–December

575

31.3 (3.28)a

14.5 (2.38)

11.4 (1.97)a

62.5 (3.42)

  1. a–cMeans within effect and column with different superscript are significantly different P ≤ 0.05