Effect of the performance, calving date and lactation period on the probability of pregnancy in beef cows

Determining what and how much each environmental factor affects pregnancy is crucial to the sustainability management of beef cow herds. The study evaluated through logistic regression effect variables on increase or reduction in rate cows. average cows was 73 %, with an age for herd 3.7 years. An one year represented a 30 % pregnancy, while reduced odds by 23 %. During lactation period, extra seven days’ 12 For every days that weaning brought forward, cows’ increased 14 0.1 kg daily gain 17 15 during first 60 post-partum end reproductive period. On other hand, loss resulted 13 odds, respectively. Factors such as age, precocity calving season, time calf remains better performance between mating are strategies chances