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Table 3 Effect of interactions among season, breed, and breeding program on pregnancy rate in lactating dairy cows

From: Fertility response of lactating dairy cows subjected to three different breeding programs under subtropical conditions

Season × breed × synch protocol
Dependent variable: pregnancy rate
Season Breed Breeding protocol Mean SE 95% confidence interval
Lower value Upper value
Cold Holstein PO 36.50b 2.90 30.82 42.17
G6G 38.10b 2.53 33.13 43.06
CIDR 37.45b 2.84 31.87 43.04
Simmental PO 56.90a 6.28 44.57 69.22
G6G 54.41a 5.80 43.03 65.80
CIDR 38.18b 6.45 25.52 50.84
Hot Holstein PO 28.33b 4.37 19.76 36.90
G6G 28.57b 3.30 22.09 35.05
CIDR 32.14b 9.04 14.40 49.88
Simmental PO 31.03b 8.89 13.60 48.47
G6G 36.67b 8.74 19.53 53.81
CIDR 27.50b 7.92 12.31 42.69
  1. PO Presynch-Ovsynch protocol, CIDR controlled internal drug release, G6G gonadotropin of Presynch, 6 days later Gonadotropin of Ovsynch. Values with different superscript letters are significantly different (p < 0.05)