Fertile Female I

reproductive strategies

mate selection

maternal investment

appropriate breeding season

what is the stage that all eggs are arrested at in the foetus

prophase I of meiosis

when does meiosis 1 occur

just before or during ovulation/follicular development

what causes the follicular phase to begin

the release of GnRH from the hypothalamus to trigger the adenohypophyseal gonadotrophs to secrete LH and FSH leading to follciular development and the continuiation of meiosis

what happens to the other 3 daughter cells

they are polar bodies

what is recruitment

choosing which primordial cells to develop in each cyclewhat

what is selection

deciding which of the developing follicles will be dominant and ovulate

what is the function of tonic LH pulses

thecal cells produce testosterone and androstenedione

what is the function of FSH

causes granulosa cells to secrete aromatase to convert testosterone and androstenedione secreted by thecal cells to oestrogen

function of oestrogen

positive feedback on the hypothalamus to increase FSH and LH secretion and leads to the maturation of the follicles

4 indicators of follicle maturation

zona pellucida - glycoproteins around the oocyte cell membrane for nutrition as granulosa cells penetrate it and form gap junctions with the oolemma and for protection when iit is released into the oviduct

granulosa cell proliferation to increase follciular size

thecal cells - ovarian stroma to basal lamina

viscous follicular fluid is in the antrum (modified serum transudate)

are granulosa cells vascula

no but thecal cells are

corpus stages order

corpus haemorrhagicum

corpus luteum

corpus albicans

day 1 of menstrual cycle

first day of menstruation and follicular phase

anoestrus

·       no cyclicity which is interrupted by pregnancy, lactation, non-bleeding periods, inadequate nutrition, stress and reproductive tract pathology

two types of oestrus

polyoestrus

monoestrus

follicular phase stages

proestrus

oestrus

luteal phase stages

metestrus

dioestrus

differences between oestrous and menstrual cycle

thickening vs no thickening

day 1 is follicular and menstrual vs day one is ovulation and end of oestrus

ovulation is day 14 in the middle of the cycle vs ovulation is day 1

2 stages vs 2 stages split into 4

50/50 vs 80/20

no change in behaviour vs change in behaviour