Pregnancy diagnosis in mare Flashcards
why do we get rid of twins in horses
unusual for twins to go to term because full SA of uterus needed for placenta because inefficient
when can you first see conceptus in mare on transrectal ultrasound
from day 12 (day 15 common)
when can you diagnose pregnancy in mare by plasma equine chorionic gonadotrophin
from day 60-120
from what point can you palpation pregnancy transrectally in mare
from day 21
how to tell the difference between endometrial cyst and embryo
embryo more circular - especially in the early gestation
when can we see the heart beat in a mare conceptus
day 21
on ventral aspect of conceptus
when should you rupture twin conceptuses
by day 14/15
re-examine mare 2 days later
Describe scanning protocols when examining pregnant mares
day 14- check for twins
day 21- embryo and heart beat
day 35 - final check- if has twins get ris and start again
How to predict stage of gestation in horse
size of the fetal eye
what happens if the pregnancy is lost before maternal recognition
return to oestrus as normal
what happens if pregnancy is lost after the endometrial cups form (day 35-150)
foetal death with mummification if it is before the placenta takes over or foetal death and expulsion if it is after
when does the luteal placental shift occur in the mare
around 150 days
why can the embryo sometimes appear as though it is detaching on ultrasound
when the allantois forms underneath it can look like placental detachment
