Estrus synchronization and AI Flashcards
what hormone can be used to synchronize animals
progesterone
how does the ram effect work
causes a surge in LH, works when previously isolated females come in contact with a male
where is the gland related to the flehmen response located
top of the mouth
controlled internal drug releases
IUD shaped device left in animals for 12 days that release hormones into there system
MGA
megestrol acetate
keeps cows from cycling in the feedlot
how do pedometers or ear tags detect estrus
they identify and alert to any abnormal movement(i.e. taking more steps than usual)
When is it more critical to properly detect estrus
when using frozen sperm
when does capacitation happen
after ejaculation/when sperm enters female body
what initiates capacitation
estrogen and uterine milk(and other substances in the female reproductive tract)
what are artificial vaginas used for
semen collection(animal must be trained to use one)
how is semen collected on an untrained animal
electroejaculator
AI method used for cows
rectocervical (manipulation of cervix over AI gun via the rectum)
AI method used for swine
Cervical (spirette enters cervix with counter clockwise rotation)
AI method used for horse
vaginocervical (insemination gun into the cervix via the vagina
how to tell if a horse is ready to be AI’d
35 mm follicle on ovary
why is soy oil sometimes used in extender
some countries don’t allow egg yolk to be shipped internationally since its an animal protein
what animal semen can not be frozen
turkey
what animal semen is rarely frozen
horse
seeder
‘Y’ shaped tool coated in progesterone, inserted into vagina for 12 days
why is embryo transfer used
if one cow has bad genetics but good mothering
super ovulation
giving extra dose of FSH so all follicles develop and produce viable oocytes instead of just one or two. used for embryo transfer
how long after estrus should embryos be collected
6-8 days
foley catheter
tube used to collect embryos
PBS solution
flush solution used during embryo collection
what is PBS solution made of
calf serum
antibiotic
T/F it doesn’t matter what reproductive phase recipients of egg are compared to donor
FALSE. recipients must be in the same phase as the donor
placentom
appears at day 60 of pregnancy, brown circle where placentae attaches to uterus
