CH 10 Reproduction Flashcards
CL=
Corpus Luteum
CH=
Corpus hemorrhagicum
LH=
Luteinizing Hormone
FSH =
Follicle stimulating hormone
GnRH =
Gonadotrophin-releasing hormone
What secretes GnRH ?
Hypothalamus
Occurs when a pregnant female ovulates and conceives while pregnant. Very rare
Superfetation
When two or more sires cause a single gestation
Superfecundation
Fertilization occurs where
The oviduct
Inner most layer of the embryo. Becomes the intestines, liver, and lungs
Endoderm
The middle layer of the embryo. Becomes the cardiovascular, musculoskeletal, and reproductive systems.
Mesoderm
The outer layer of the embryo. Becomes hair, skin, and the nervous system
Ectoderm
What is ECF?
A chemical signal the body sends out when a female is pregnant to protect the zygote from being targeted as foreign.
Zonary placental attachment is common in what animals
Dogs and cats
Cotyledonary placental attachment is common in what animals
Ruminants
Diffuse placental attachment is common in what animals
Horses/ pigs
Discoid placental attachment is common in what animals
Rodents
The canine estrus cycle averages
6-7months
What are the 4 stages of the estrus cycle
Proestrus
Estrus
Diestrus
Anestrus
Semen can be stored how
In liquid nitrogen
Fertilization should occur with frozen semen ____ hours after thawing
12 hours
Fresh semen delivered by natural service or by AI stays fertile for ___ to___ ______
3-5 days
Pregnancy examination by palpitation is possible in dogs by
21-30 days
Pregnancy examination by ultrasound is possible to do from ____ to _____ days for dogs
21-28
X ray can be used for pregnancy examinations at ____ days or after for dogs
43
Stage 1 or parturition in dogs can last how long if not longer
6-12 hours
Stage 2 of parturition consists of what
Puppies being delivered every 20-60min
String continual contractions for 30 minutes without progress, prolonged interval between pups.
Dystocia
___% of queens ovulate with a single mating
50%
If ovulation does not occur after breeding, or no breeding occurs the queen will go back into estrus in ___ to ___ days
3-14 days
Gestation in cats last
60 days
X-rays can be done to check pregnancy in cats at ___days
40
Palpating can be done for pregnancy in cats at ___ days
18
A heartbeat can be detected in cats that are pregnant at ___ days
16
Doing Semen analysis atleast ____ Sperm should be checked, and their relative speed and direction. ___ % or greater of sperm that are progressively motile is desirable
100
70%
