pregnancy determination Flashcards
characteristics of an ideal pregnancy test
quick
inexpensive
simple
accurate
minimize animal handling/labor
cannot cause abortion
what time frame is early embryonic loss
fertilization to day 28 of pregnancy
what percent of pregnancies are lost in early embryonic loss for beef and dairy cows
Beef: 20%
Dairy: 30%
what time frame is late embryonic loss
pregnancy day 28-day 42
what percent of pregnancies are lost in late embryonic loss for beef and dairy cows
Beef: 6%
Dairy: 12%
when is transrectal palpation used possible for pregnancy determination
after 40 days
how does the size of the uterine horns change due to pregnancy
the horn with the pregnancy will become larger than the other one
stage 2 of cow pregnancy
-time
-anatomy
-fluids
-placentomes
-90-150 days
-cervix near pelvic brim may have fallen into abdominal cavity
-fluid turbulence in uterine artery
-presence of placentomes
stage 1 of cow pregnancy
-time
-anatomy
-fluids
-membranes
-placentomes
-40-90 days
-cervix and uterine horn still in pelvic cavity
-uterus somewhat enlarged
-present upon slippage
-indistinct to the touch
stage 3 of cow pregnancy
-time
-anatomy
-palpation
-characteristics
-150 days-term
-cervix near pelvic brim(coming back)
-calf is easily palpated
-75% of weight gain and growth is during last trimester
how are cows ultrasounded
transrectally
how are ewes and goats untrasounded
abdominally
echogenic definition
dense tissue(shows up white on ultrasound)
non-echogenic definition
fluid(shows up black on ultrasound)
what does doppler ultrasonography show
bloodflow
