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Table 2 Distribution and descriptive statistics of the cows included in this study

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

Item Breed Total
Holstein Simmental
AI (n) Preg. (n) PR (%) AI. (n) Preg. (n) PR (%) AI. (n) Preg. (n) PR (%)
Season Cold 914 342 37.42 ± 1.60 181 91 50.28 ± 3.73 1095 433 39.54 ± 1.48
Hot 358 103 28.77 ± 2.39 67 21 31.34 ± 5.71 425 124 29.18 ± 2.20
Total 1272 445 34.98 ± 1.38 248 112 45.16 ± 3.17 1520 557 36.64 ± 1.24
Breeding protocol PO 394 134 34.01 ± 2.39 87 42 48.28 ± 5.39 481 176 36.59 ± 2.20
G6G 567 196 34.57 ± 1.20 98 48 48.98 ± 5.07 665 244 36.69 ± 1.87
CIDR 311 115 36.98 ± 2.74 63 22 34.92 ± 6.05 374 137 36.63 ± 2.49
Total 1272 445 34.98 ± 1.38 248 112 45.16 ± 3.17 1520 557 36.64 ± 1.24
  1. AI artificial insemination, Preg. pregnant, PR pregnancy rate, PO Presynch-Ovsynch protocol, CIDR controlled internal drug release, G6G gonadotropin of Presynch, 6 days later gonadotropin of Ovsynch