Reproductive Cyclicity Flashcards
chapter 7
anestrus
a period when cyclicity stops
when pregnancy occurs….
anestrus
uterine involution
lactation
what are the two major phases during the estrous cycle?
follicular phase and luteal phase
what are the primary ovarian structure during follicular phase?
antral follicules
what is the primary hormone during the follicular phase?
estradiol
what are the three types of estrous cycles?
- polyestrus
- seasonally
polyestous (short/long breeders) - monoestrus
what causes anestrus in animals?
seasonal (some aniamls)
stress/nutriton
pregnancy
lactation
what comes before low melatonin release?
low norepinephrine
what is the primary ovarian structure during the luteal phase?
corpora luteal
what is the primary hormone during the luteal phase?
progesterone
what are the four stages during the estrous cycle?
proestrus, estrus, metestrus, and diestrus
which stages can be seen in the follicular phase?
proestrus and estrus
which stages can be seen during the luteal phase?
metestrus and diestrus
what occurs during proestrus?
increase of estradiol
formation of maturing ovulatory follicles
what occurs during estrus?
sexual behavior and peak of estradiol
what occurs during metesturs?
increase of progesterone
decrease of estradiol
CL formation
what occurs during diestrus?
high progesterone
fully functional CL
true/false
lactational anestrus does not occur in cats
true
because she will come into estrus while lactating
what can cause anestrus?
pregnancy
lactation
poor nutrition/ sickness
presence of offspring
season
stress
why does gestational anestrus occur?
increase amount of progesterone which inhibits GnRH
In short day breeders (ewe) the secrete _____ melatonin
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