Hormones and the cycle

Question 1

perimenopause hormone changes

Answer 1

reduced cycle length
shortening of follicular phase, constant luteul phase
no change in progesterone (as estadiol loses potency eventually prog will drop due to lack of stimulation at ovulation)
estradiol lower in certain past of cycle than others (losing its ability to stimulate follices like used to for ovulation)
FSH elevated early follicular stage and fall during follicular maturation
transitions slowly to full menopause changes

Question 2

post menopause changes

Answer 2

reduction in androgens
reduced estrogens (

Question 3

Normal cycle pituitary hormone cycle

Answer 3

FSH and LH

FSH - elevated at ovulation slightly
LH - elevated right before ovulation, stim oocyte development

during day 1-21 the uterine lining is thickening

Question 4

Egg development

Answer 4

1-14 - growing follicle

14-21 corpeus luteum

Question 5

ovarian hormones

Answer 5

estrogen - increased until ovulution peak then starts to decrease
porgester - decrease inestrogen stim progesterone increase. progesterone with prostaglandins r/t midycycle LH rupture follicular wall

Question 6

HPO axis feedback loop

Answer 6

Anterior pituitary –> GnRH –> FSH and LH

reduced estrogen –> increases FSH secretion and LH storage

increased estrogen –> mid cycle surge in LH and