POPM 4230 Lecture Notes - Lecture 5: Perinatal Mortality, Colostrum, Obstructed Labour
30 Nov 2016
School
Department
Course
Professor
Document Summary
= a calf carried to term, or at least longer than 260 days and born dead or dying w. in 24-48 hours of birth. 9. 6% of calves are stillborn in canada and 8% of calves are stillborn in us. Significantly higher in primiparious heifers vs multiparous cows. 90% of calves, which die in the perinatal period, were alive at the beginning of calving. Unweaned heifers have the highest mortality rate. 7. 5% pre-weaning mortality risk in heifers born alive. = = much of this loss is preventable! Majority due of death due to diarrhea. - and calve 100 cows per year which results in 50 heifer calves. Dystocia (main cause = feto-pelvic disproportion, fetus to mother hip ratio) = difficult or abnormal calving due to a prolonged unassisted parturition process, or due to a prolonged or severe assisted calf delivery. *holstein cows have the highest rate of dystocia (beef is lower) 10 calves died at birth or w. in 1st 48 hrs.
