Reproductive cycle graph - Follicular phase Flashcards
fluctuations in female sex hormones released from ovaries: estrogen, progesterone, inhibin
As eggs develop get
28 days
how long reproductive cycle
on day 14
Ovulation occurs
Day 0 - ant pit releases FSH and LH
Endometrium - proliferative phase: increasing estrogen levels inducing new layer to form since old shed in menses in previous week
When hypo and ant pit see high estrogen levels produce less FSH and LH
Granulosis cells continue to produce estrogen and produce two more hormones in higher amounts as well: progesterone and inhibin (inhibit FSH release from ant pit - as increases FSH decreases)
If estrogen releases super high level causes brain to want to release more FSH and LH - paradoxical event; release really high amount FSH and LH = really see big jump in LH mainly because granulosis cells producing inhibin and inhibin amount high at this point so get high LH amount - get luteal surge pushes development of follicle to final step - ovulation and egg pops out follicle at day 14
Follicular phase
FSH: stimulates growth follicles; number granulosis cells increases as days go by; granulosis cells secrete estrogen so estrogen levels in the blood increase as follicles grow
LH: making thecal cells surround follicle producing hormone: androstenedione - granulosa cells convert this into estrogen further increasing levels
Day 0 - ant pit releases FSH and LH
FSH and LH: released from ant pit = affect development follicles in ovarian cycle
Gonadotropic hormone levels:
cause release hormones from ovaries
As follicles develop
influenced by levels of sex hormones released from ovaries
Uterine cycle -
where endometrial lining shed
Menses -
new layer endometrium forms and grows/proliferates
Proliferative phase -
endometrium prepared for implantation by a fertilized egg even if no fertilized egg
Secretory phase -
