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Therio Exam #3
VetMed Therio Exam #3
| Question | Answer |
|---|---|
| Effects of E2 on Repro Tract | hyperemia genital edema leukocytosis increased mucosal production increased uterine gland growth increased myometrial tone |
| Follicular Phase | luteolysis (proestrus) + ovulation (estrus) |
| Luteal Phase | ovulation (metestrus) + CL regression (diestrus) |
| Effects of P4 | (-) feedback to hypothalamus stimulates max excretion by endometrial glands for fetus inhibits motility of myometrium promotes mammary development does NOT prevent follicular waves |
| Expected Progeny Differences | provide estimates of genetic value of animal (BW, growth, maternal traits, carcass traits) |
| Seedstock | purebred/registered cattle that produce bulls and replacement females more intense management, better records use more assisted repro techniques |
| Cow/Calf Producer | brood cows that produce weans and sales calves |
| Backgrounder/Stocker Operation | buys calves @ 300-700# and sells to feedlots develops on forage or grain |
| Reproductive Goals | calf crop >90% pregnancy rate >95% 1st 21-day pregnancy rate >65% |
| Factors Affecting Cow Fertility | age genetics days post-partum nutrition ambient temperature (heat stress) infectious agents |
| Voluntary Breeding Waiting Period | period of time after calving and before next breeding, usually 45-65d |
| Days to First Service | period of time from calving to first breeding, usually ~75d |
| 21-Day Pregnancy Rate | total number of cows that become pregnant during a 21-day window out of total number of cows eligible to become pregnant goal = >20% avg = 12-14% |
| Minimum Pelvic Measurement in Heifers | 150 cm^2 @ 1YO |
| Four (+) Signs of Pregnancy | fetal membrane slip amniotic vesicle placentomes / cotyledons fetus |
| Fetal Sizes 60d 90d 120d 150d 210d | mouse rate small cat large cat beagle dog |
| Supportive Signs of Pregnancy | asymmetry of uterine horns thinning and fluctuation of uterine wall fixation of cervix fremitus of middle uterine artery presence of CL |
| False (+) Progesterone Test | ovarian abnormalities poor estrus detection pyometra |
| Hydrops Allantois | placental (maternal) cause 85-90% sporadic adverse sequelae common prognosis for fertility guarded canNOT palpate fetus, placentomes "apple" shape |
| Hydrops Amniae | fetal cause 5-10% chronic adverse sequelae rare prognosis for fertility fair to good CAN palpate fetus, placentomes "pear" shape |
| Infectious Agents of Metritis | Arcanobacter pyogenes Fusobacterium sp. Bacteroides spp. E. coli Clostridium |
| Common Causes of Abortion | bacteria - Campylobacter viral - IBR, BVD, Lepto protozoan - Tritrichomonas foetus |
| Most Frequent Diagnosed Cause of Viral Abortions | Infectious Bovine Rhinotracheitis |
| Three Most Common Toxic Causes of Abortion | nitrates ponderosa pine locoweed |
| Abortion Agent that Causes More Economic Loss than any other Plant | locoweed |
| Causes of Majority of Abortion Cases | IBR BVD Leptospirosis Arcanobacter Neospora |
| Motility Goal of Bull Semen | >30% motile |
| Morphology Goal of Bull Semen | >70% normal |
| Complications of Preputial Injuries | stricture formation adhesions phimosis paraphimosis |
| Predisposing Factors for Preputial Injuries | bos indicus influence polled breeds (lack preputial retractor muscle) |
| Signalment of Preputial Abscesses | bos taurus breeds |
| Differential Diagnoses for Inguinal/Scrotal Hernia | subperitoneal fat periorchitis hydrocele aneurysms of pampiniform plexus inguinal abscess |
| C/S of Penile Hematoma | symmetrical swelling at distal curve of sigmoid flexure, near base of scrotum may visualize bruising in teat area |
| C/S of Inguinal/Scrotal Hernia | hourglass swelling of one side of scrotum (usually left) |