POPM 4230 Lecture Notes - Perinatal Mortality, Obstructed Labour, Cervical Dilation

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11 Mar 2023
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Stillbirths (or perinatal mortality) happens when a calf that has been carried to term (or at least longer than 260 days) is born dead or dies within 24-48 hours of birth. In canada, roughly 8% of calves are stillborn. This rate is higher for first-time calvers (heifers that are having their first calf). While high, much of this loss is preventable. Causes for perinatal mortality include: dystocia (difficult or abnormal calving), anoxia (low oxygen levels in the system of the calf, congenital issues. Select the tabs below to learn about the factors, impact, and prevention methods for dystocia. Factors that cause dystocia include: feto-pelvic disproportion: this is the predominant cause (especially in first-calf heifers), the ratio of fetus:pelvis size is too large, causes prolonged parturition (calving), requires forced extraction or. Caesarian section: breed, calf presentation (e. g. arm pointing backwards, head bent backwards, uterine torsion (i. e. , the uterus is twisted along its long axis)

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