W10_03 menstrual cycle and disorders of menstruation Flashcards
when do ovulatory periods start after menarche?
usually 12 months, but up to 3 years
what’s the length of the menstrual cycle?
28 d (24-32)
what’s the length of menstruation?
3-7 days
note: for endometrial development, menses begins in the follicular phase. Then?
Menses moves into the proliferative phase. At the onset of ovulation, it then moves into the secretory phase
what’s the staging of follicular development?
follicular phase - ovulation - luteal phase
estrogen is like the fertilizer that makes the grass grow. What is progesterone?
the lawn mower that cuts the grass down (in follicular phase)
inhibin A falling causes what?
rise in FSH
inhibin B and estradiol increase causes what?
negative feedback to FSH
what causes LH to rise?
estrogen increase - positive feedback
how does selection for a single follicle work?
it’s bigger, has more granulosa cells, and can aromatize androgens better. Thus, it inhibits all the other cells from growing
when does the oocyte get released after the LH surge?
36 hours (35-44)
what’s spinnbarkeit?
clear mucus discharge that’s a sign of the cycle - will be there just before the egg releases
what’s molimina?
premenstrual syndrome; caused by progesterone
when does the oocyte release on a basal body temperature graph?
there’s a dip in temp - JUST after the rise in temp is the release
how many days is the luteal phase?
14 days! (if it’s not, then something’s wrong)
