Menopause Flashcards
30% of premature menopause is caused by
surgery (hysterectomy)
Median and age range of menopause
median: 51.4
range: 48-55
Median for perimenopause
47.5 years, for 4 years
The physiologic period of a woman’s life during which there is regression of ovarian function
Climacteric
Menopause is the permanent cessation of menstruation caused by the failure of ovarian follicular development DESPITE WHAT
Despite the presence of adequate gonadotropin stimulation
Examples of iatrogenic menopause
surgical, radiation therapy, chemotherapy
______ # follicles at birth, _____# remain at menopause
1 million at birth
1,000 remain at menopause
Which estrogen (is still dominant but) decreases secretion during perimenopause
Estradiol
In addition to estradiol, the production of what essential “hormone” decreases with perimenopause
Inhibin
What will happen if, in each cycle, inhibin secretion
gets lower and lower?
Inhibin’s job is to inhibit secretion of FSH and LH.
Without it, the feedback on the hypothalamus and pituitary is hindered, and FSH and LH remain high.
Elevations of FSH, particularly at the beginning of a cycle, are predictive of perimenopause and of the fertility of remaining ova.
Where is inhibin produced
Gonads, pituitary gland, placenta, corpus luteum, etc
FSH stims secretion of inhibin from granulosa cells of ovarian follicles
By what age does risk of spontaneous abortion rise to 50%
45
At menopause the ratio of estrogen to androgen ___
decreases
At menopause, sex hormone - binding globulin secretion __-
decreases
At menopause, peripheral aromatization of DHEA to estrone ___
INCREASES