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Table 1 Mean ± SD of parity, milk yield/ton, services/conception, days open and estradiol in dairy cows calving during winter/heat stress with and without retained fetal membranes

From: The effect of Seasonal heat stress on oxidants–antioxidants biomarkers, trace minerals and acute-phase response of peri-parturient Holstein Friesian cows supplemented with adequate minerals and vitamins with and without retained fetal membranes

Months Cold Hot P value
Parameters Normal Retained Normal Retained
Number of cows 117 6 138 29  
Number of samples 234 18 276 87  
Prevalence 95.12%d 4.88%a 82.26%c 17.37%b 0.0001
Milk yield/ton 7.87 ± 1.79b 8.00 ± 1.03b 6.87 ± 2.41a 8.43 ± 1.29b 0.0001
Parity 2.67 ± 1.49a 3.00 ± 0.47a 3.04 ± 1.63a 4.93 ± 2.24b 0.0001
Services/conception 1.35 ± .63a 1.52 ± .51ab 1.79 ± .80b 3.14 ± 1.20c 0.0001
Days open 65.66 ± 11.68 65.34 ± 5.41 69.35 ± 15.57 69.66 ± 18.95 NS
Estradiol pg/ml 982 ± 4.92d 836 ± 16.06a 953 ± 6.93c 898 ± 9.81b 0.0001
  1. Means with different superscripts (a, b, c, d) are significant at P < 0.05, NS (non-significant)
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