Reproductive Physiology Flashcards
when does oestrogen have positive feedback?
mid-cycle 12-14d
how long does LH take to produce ovulation from the follicle? what follicle called that releases egg?
36 hours
mature Grafiaan follice
what does the follicle become after release of the egg?
corpus luteum
what does the corpus luteum mainly produce?
progesterone
what do theca cells do?
stimulate inhibin which suppresses LH and FSH
what is needed to prevent corpus luteum changing to corpus albicans and shrinking?
HcG
what day in the cycle is the egg released?
day 14
where does oogenesis arrest after birth?
meiosis 1
what happens at puberty?
becomes secondary oocyte and polar body
what is FSH- independent in oogenesis?
Primordial follicle
Primary follicles
what is FSH -dependent in oogenesis?
Theca cells
Mature Graafian follicles
Ovulation
where does oestradiol come from?
granulosa cells
what does oestradiol do?
supports secondary sexual characteristics and reproductive organs
when does oestradiol have positive control?
positive control of LH surge in late follicular stage
what is the negative feedback of oestrogen?
suppresses release of FSH and LH from anterior pituitary
