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Beef Cattle Reproduction

Beef Cattle Reproduction. Whitney A. Whitworth Associate Professor of Animal Science University of Arkansas at Monticello. Parturition. Process of giving birth Initiated by hormone secretions of the fetus Caused by fetal stress. Parturition. Most births occur naturally with no assistance

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Beef Cattle Reproduction

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  1. Beef Cattle Reproduction Whitney A. Whitworth Associate Professor of Animal Science University of Arkansas at Monticello

  2. Parturition • Process of giving birth • Initiated by hormone secretions of the fetus • Caused by fetal stress

  3. Parturition • Most births occur naturally with no assistance • Malpresentations and inappropriate size of offspring may necessitate intervention • Dystocia = difficult birth • Major cause of dystocia is size of fetus

  4. Parturition • Females preparing to give birth demonstrate behavioral changes • Become restless, separate from others, show discomfort • Udder becomes engorged, vulva begins to swell

  5. Parturition • Birth occurs in three stages: • Stage I = initiation of myometrial contractions • Stage II = expulsion of fetus • Must be completed in a timely manner • Stage III = expulsion of placenta • May take up to several days

  6. Parturition • Following birth, most animals clean their young and bond with them • Critical for young to eat ASAP so that they get colostrum • Contains maternal antibodies and is responsible for first immunity • Greatly increases rate of survival of offspring

  7. Parturition • Interval between parturition and onset of estrus activity is called postpartum or postpartum interval • Cattle must become pregnant within 80 d after birth to ensure a yearly calving interval • Greatly affected by poor nutrition, and presence of suckling offspring

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