Oestrous Cycle In General Flashcards
Name the steps of ovarian follicles and corpus luteum which lead to lactuation and pregnancy
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Name the different phases of oestrus cycle
- Oestrus and ovulation; Follicular phase
- Luteal phase (ends with CL regression)
- Follicular phase
Oestrus and ovulation phase of oestrus cycle
-female accepts male and is standing to be mounted
-Gonadotrophin surge leading to ovulation- rapid rise of Oestradiol induces surge
Oestrus=
Heat
Animals only show behavioural symptoms of HEAT only if they have bee…
Pre exposed to progesterone
Luteal phase of oestrus cycle
-functional lifespan of corpus luteum (CL)
-follicles begin to secrete progesterone and transform into luteal cells
Follicular phase of oestrus cycle
Rapidly growing pre-ovulatory follicles- single dominant follicle is now synthesising a lot of Oestradiol responsible for rapid rise in Oestradiol
Ovulation occurs
Fill in the links of the oestrous cycle table
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Effects of hormones on the structure and function of the reproductive tract:
Follicular phase Oestradiol Prepares tract for…
Luteal phase Progesterone Prepares tract for…
Upcoming fertilisation
Upcoming pregnancy
What are the effects of Oestradiol on the structure and function of female repro tract:
-in general
Stimulates proliferation, motility, perfusion and serous secretory activity within the reproductive tract
What are the effects of Oestradiol on the structure and function of female repro tract:
-on uterine horn
-induces growth of uterine horn
-enhances motility via ^ oxytocin receptor levels
0increased excitability, vascularity and progesterone receptor
What are the effects of Oestradiol on the structure and function of female repro tract:
-on fimbriae and oviduct
Increased motility—> transport of gametes
Increased ciliary activity
Increased secretion
What are the effects of Oestradiol on the structure and function of female repro tract:
-cervix
Increased serous secretions
And gland/crypt development
What are the effects of Oestradiol on the structure and function of female repro tract:
-vagina
Increased :
acidic pH
epithelium proliferates
keratinisation
What are the effects of progesterone on the structure and function of female repro tract:
-on uterine ehorn
^ growth of uterine wall
^ myometrium thickness
^leucocytes towards the end
Decreased
-motility by reducing oxytocin receptors & myometrium excitability
What are the effects of progesterone on the structure and function of female repro tract:
-on fimbriae and oviduct
Decreased
-motility
-ciliary. Activity
-secretion
What are the effects of progesterone on the structure and function of female repro tract:
-cervix
^ mucous secretions
What are the effects of progesterone on the structure and function of female repro tract:
-in general
suppresses motility, stimulates growth, and enhances endometrial glandular activity and mucous secretions
Difference between what effect hormone progesterone and Oestradiol had on glands
Prog: ^ glands coiling
Oes: ^ glands lengthening
Puberty is defined as…
First time animal ovulates
Age at which animal. Reaches puberty and whether oestrous cycle is seasonal or not
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Polyoestrous meaning
Having regular/multiple oestrous cycles a year
Cyclic vs acyclic
Cyclic—> having regular cycles
Acyclic—> are in different reproductive states during their life eg cannot have reproductive symptoms during pregnancy (absence of regular cycles)
