publication . Article . 2017

Prevalence and risk factors for stillbirths in Holstein cows in a hot environment

Miguel Mellado; María I. Chávez; Ulises Macías-Cruz; Leonel Avendaño-Reyes; Evaristo Carrillo; José E. García;
Open Access English
  • Published: 06 Jun 2017 Journal: Spanish Journal of Agricultural Research (issn: 2171-9292, eissn: 2171-9292, Copyright policy)
  • Publisher: Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
Abstract
<jats:p>Risk factors for stillbirth were studied in a dairy operation in northern Mexico (25°N). Data set consisted of 29406 full term calving records. Factors affecting stillbirths were analyzed using a step-wise multivariable logistic regression models. The predictive indicators of stillbirth risk were: temperature-humidity index (THI) during pregnancy and at calving, season of calving, calf birth weight, gestation length, semen characteristics (conventional or sexed), gender of calves, hour of calving and type of parturition (normal or dystocic). Throughout the study period, 7.3 (95%, confidence interval= 7.0–7.6) of every 100 calving events had a stillborn c...
Subjects
Medical Subject Headings: reproductive and urinary physiology
free text keywords: Animal breeding, genetics and reproduction, heat stress; sexed semen; birth weight; dystocia; gestation length, heat stress, sexed semen, dystocia, gestation length, Agriculture, S, Ice calving, Animal science, Agronomy, Confidence interval, Gestation, Peripartum Period, Full Term, Logistic regression, Biology, Pregnancy, medicine.disease, medicine, Birth weight
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publication . Article . 2017

Prevalence and risk factors for stillbirths in Holstein cows in a hot environment

Miguel Mellado; María I. Chávez; Ulises Macías-Cruz; Leonel Avendaño-Reyes; Evaristo Carrillo; José E. García;