POPM 4230 Lecture Notes - Lecture 3: Pregnancy, Subclinical Infection, Metritis

• School: University of Guelph
• Department: Population Medicine
• Course: POPM 4230
• Professor: Terri O' Sullivan

Document Summary

Systematic breeding management program: the more calvings we can get from one cow in life span = more profitable she is. Disease: dystocia, rp, abortion, uterine disease. Ruminant placentation where allantois meets with placenta: caruncle maternal component, cotyledon fetal component, placentome both. Freemartin: heifer is born co-twin to a male, >90% are freemartins (chimera xx/xy, female sex characteristics androgenized, abnormal external and/or internal genital, 95% are sterile. The premature expulsion from the uterus of the embryo or non-viable fetus. Impairment of the function of the placenta: damage to fetus: 15-25% of pregnancies diagnosed at 28 days gestation are lost by 60 days: twins, heat stress, fetal genetic anomalies, maternal disease. Infectious abortion: disease agent may be introduced by circulation or up reproductive tract, sporadic abortion (expected incidence 3-5%) Although i(cid:374)fe(cid:272)tious, does(cid:374)(cid:859)t (cid:396)ep(cid:396)ese(cid:374)t a da(cid:374)ge(cid:396) to (cid:396)est of he(cid:396)d (cid:894)(cid:374)ot highl(cid:455) (cid:272)o(cid:374)tagious(cid:895) Bacteremia from infection somewhere else in body. Contagious abortion: agents are contagious and have predilection for causing abortion.