Environmental factors on the probability of pregnancy in early or conventionally weaned beef cows

Potential variables for the reproductive success of beef cows were evaluated. Included in model age cow at calving; interval between Julian calving date and end breeding season; body weight conditions calving, 75 days post-partum mean daily variation these dates. Logistic regression was used analysis, with parameters evaluated using odds ratio statistic, estimating chance pregnancy. The rate pregnancy 84% 55% early late-weaned cows, respectively. For weaned date, cow, gain from to post-partum, period. there only two variables, every year above average herd, have an 80.9% greater pregnancy, while a reduction one reduces by 44.7%. In seven after chances 22.6%, whereas before increases 29.2%. Greater gains weight, period, determine probability