Ch. 10 Animal Reproduction Flashcards
Ovulation:
the release of oocyte from the follicle
After ovulation, the empty follicular sac fills with a clot called
corpus hemorrhagicum
What hormone increases in ovulation
progesterone
Fertilization occurs in the
last part of the oviduct
During fertilization the oocyte becomes _ _
multicellular blastocyst
_ _ (CL) forms after ovulation
corpus luteum
During fertilization the zygote releases _ _ _ (ECF)
early conception factor
In fertilization if embryo does not release conception factor _ regresses
Corpus luteum (CL)
Superfecundation
multiple sires of two or more offspring in one gestation
Superfetation
-pregnant female conceives again while pregnant
-rare under normal conditions
Outermost cell of zygote become _
placenta
Uterine-placental attachment
number of layers separating maternal and fetal blood
Distribution of contact points
-Diffuse
-Cotyledonary
-Zonary
-Discoid
Hormones from these sites control sperm and testosterone production:
hypothalamus
anterior pituitary
gonads
Spermtogenesis completed in _ _
seminiferous tubule
Development to ejaculation:
62 days
Puberty in canines
7-12 months
Mature female canine is called
bitch, dam
Neutered female:
ovariectomized, spayed
Mature male canine is called
dog, stud
Birthing in canine is called
whelping
Canine estrous cycle averages about - months but varies from under 4 to over 12 months
6-7
Four stages of canine estrous cycle that repeat
-Proestrus: time leading to estrus
-Estrus:time of sexual receptivity & mating
-Diestrus: time of pregnancy establishment
-Anestrus: time when female is not undergoing reproductive events
Parturition (birth) occurs between _ and _ if pregnancy has been established
diestrus & anestrus
Canine breeding occurs during
estrus
What should be measured to determine time of canine breeding
P4 and LH spikes
How to measure P4 and LH spikes
vaginal cytology and bitch behavior
Artificial insemination techniques
vaginal, surgical, transcervical, fresh or frozen semen precautions
_-day gestation for canines
60
Dx of canine gestation
Palpation: 21-30 days
Ultrasound: 21-28 days
Radiographs: after 43 days (fetal count, size, and presentation 2-4 days before due
Canine parturition (whelp) stage one:
-last 6-12 hours, but can last up to 36 hrs
-restlessness, nesting behavior
-uterine contractions without an abnormal component
-temp. drop about 24 hours before state 2
What stage of canine parturition does the following occur:
-puppies delivered at this stage; takes 20-60 minutes
-60% anterior, 40% breech
stage 2
Canine dystocia: consult vet promptly if:
-strong continual contractions from 30min w/out progress
-weak ,infrequent contractions for 2 hours w/out progress
-prolonged interval between puppies
-malpsotioning or large size
What is used to assess fetal viability
ultrasound
Puberty in felines
4-12 months, 5-6 lbs (female)
mature female feline is called
queen
mature male cat is called a
tom
birthing in felines is called
queening
Felines are _ ovulators
induced (daylight dependent)
Estrus behaviors in feline
-increased vocalizing
-rolling, lordosis, treading in place
-maybe: anorexia and spraying
Breeding is best on the _ day of estrus for felines
3rd
3 possible of outcomes of feline estrous cycle
pregnancy, non pregnancy, no ovulation
Primary hormones for feline estrous cycle
FSH, LH, P4, E2, Prolactin, Relaxin
Dx of feline gestation
signs: larger teats, weight gain
ultrasound: heartbeat at 16 days
palpation: 18 days
radiograph: after day 40
Feline parturition can take how long?
couple of hours to over a day
What stage of feline parturition is described:
-uterine contractions, no abdominal contractions
-nesting and decreased activity
-increased fetal movements; lactational secretion
-relaxation around perineal area
-ends w/ chorioallantoic membrane rupture
stage 1
stage 2 of feline parturition
fetuses delivered
stage 3 feline parturition
-placenta passed
-uterus returns to normal