Evaluation of prevalence, risk factors, and therapeutic approach for subclinical endometritis and oviductal occlusion in repeat breeder Holstein cattle.

Due to the productive and economic consequences of Repeat Breeder (RB) syndrome, the objectives of this study were to determine the prevalence and risk factors for subclinical endometritis (SE) and oviductal occlusion (OO) in RB cows, and to make a therapeutic approach for these pathologies. In 99 RB cows, endometrial cytologies were performed to assess the presence of SE (>5 % polymorphonuclear neutrophils), and the oviductal patency was checked using the phenolsulfonphthalein test. Body condition score was evaluated, and data from each animal were obtained from on-farm software (parity, calving date, artificial insemination (AI) date, number of AI, and occurrence of postpartum diseases).

Evaluation of Anogenital Distance and Anti-Müllerian Hormone Plasmatic Concentration as Potential Phenotypes to Predict Reproductive Performance in Holstein Heifers.

Anogenital distance (AGD) is a marker of the degree of prenatal exposure to androgens in multiple species, and it has been suggested that there is an inverse association between AGD and fertility. Therefore, the aim of this study was to determine the usefulness of AGD and anti-Müllerian hormone (AMH) concentrations, an indirect marker of the follicular population, as predictors of future reproductive potential in Holstein cattle. The AGD was measured in 566 females from 9 dairy farms in Galicia (Spain).

Effect of recombinant bovine granulocyte colony-stimulating factor treatment during the peripartum period on postpartum diseases, reproductive performance, and milk production in Holstein cattle.

To boost the immune function around parturition, recombinant bovine granulocyte colony-stimulating factor (rbG-CSF) has been used to increase the number of neutrophils. Therefore, the aim of this study was to quantify the effect of rbG-CSF administration on the incidence of postpartum pathologies, reproductive performance, and milk production during the first three months of lactation. A total of 199 Holstein cows from one herd were included and were randomly allocated into two groups: Control (n = 103) and rbG-CSF (n = 96).