Menopause Flashcards

1
Q

What is menopausal transition?

A
  • regular periods to irregular periods to when periods stop

- AKA perimenopausal

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2
Q

What is menopause?

A
  • stopping menstruatin bc of loss of ovarian follicular function
  • no period for 12 months (amenorrhea)
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3
Q

What is premature ovarian failure?

A
  • premature menopause

- before age of 40

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4
Q

What are the symptoms of menopausal transition?

A
  • hot flushes
  • reduced cycle length
  • irregular periods
  • atrophic vagina post menopause
  • impaired fertility leading up to menopause
  • mood symptoms
  • urinary complaints
  • sleep disturbance
  • vasomotor symptoms
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5
Q

What is atrophic vagina?

A
  • vaginal thinning, drying and inflammation of the walls bc of less oestrogen
  • painful sex
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6
Q

What is a follicle?

A

-oocyte surrounded by granulosa and theca cells

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7
Q

What happens to the number of follicles as we age?

A
  • Fetus= 7 million
  • birth= 1 million
  • Puberty= 400 000
  • menopause= 140
  • post menopause= hardly any - maybe like 1
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8
Q

Why is menstruation stopping not a reason for menopause?

A
  • average woman has 444 cycles in her life
  • so only 444 eggs lost through cycle
  • so at menopause there are still between 1 and 140 eggs left, so periods stopping is not the reason for menopause
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9
Q

Why do the eggs die as we age?

A
  • apoptosis
  • breakdown
  • smoking causes menopause 2 years early
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10
Q

What are the effects of granulosa cells?

A
  • produce AMH

- secrete inhibin B

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11
Q

If you have less granulosa cells because of follicle depletion, what happens?

A
  • less AMH
  • less Inhibin B
  • less Inhibin A
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12
Q

What is the role of AMH?

A
men= regress mullerian duct
women= inhibit excess FSH
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13
Q

What happens if AMH reduced?

A
  • excess FSH
  • this means more (than required) follicular recruitment
  • more follicle loss
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14
Q

What does Inhibin B do?

A

Inhibits FSH production

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15
Q

What happens if you have low Inhibin B?

A
  • more FSH
  • more follicular recruitment
  • more follicle loss
  • so as woman gets nearer to menopause age, she has more menstrual cycles that have no ovulation in them
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16
Q

Where is Inhibin A produced?

A

in the ovaries

17
Q

What does Inhibin A do?

A

Inhibits FSH production

18
Q

What happens if Inhibin A is reduced?

A

More FSH

19
Q

What happens if there is excess FSH?

A
- FSH receptors on the follicles become less sensitive 
to FSH (due to extremely high levels of FSH)
- due to loss of FSH receptors and their sensitivity, there is an impairment in recruitment of follicles and selection of a dominant follicle (ie the follicles do not get selected)
20
Q

What else happens as a result of granulosa cells decline?

A

woman has impaired secretion of growth

factors, signalling pathways, survival factors, oestrogen, and progesterone

21
Q

What is the reason for shortened cycle length?

A
  • there is decline in inhibin B
  • high FSH levels
  • so follicles are recruited early
  • oestrogen goes up earlier
  • LH surge happens earlier
  • so follicular phase is shorter
  • so shorter cycle
22
Q

What causes delayed or absent periods?

A
  • granulosa cells are dysfunctioning
  • oestrogen levels cant reach high enough to flip negative feedback to positive feedback
  • no LH surge
  • no ovulation
23
Q

What causes heavier periods?

A
  • less Inhibin B
  • high FSH
  • oestrogen levels increase earlier than in normal cycle
  • oestrogen remains high for long time
  • endometrium of uterus hyperproliferates
  • endometrium outgrows blood supply
  • prolonged bleeding (2-3 weeks)
24
Q

What can you provide patients with to help them with bleeding?

A
  • progesterone
25
Q

What causes hot flushes?

A
  • less granulosa cells
  • less oestrogen
  • disturb serotonin levels
  • resets thermoregulatory nucleus in the brain stem
  • heat loss
  • brain thinks body is hotter than it acc is- sweating
26
Q

What happens to the hormone levels?

A
  • 10 years before menopause, AMH declines
  • 2 years before menopause, inhibin B levels decline
  • FSH levels are variable, but generally increase towards menopause
  • LH increases later in menopause
  • Oestrogen levels fall, but this is very close to the menopause
  • Adrenal and ovarian androgen levels decline with age (from about 20 years old)
27
Q

What happens to progesterone after menopause?

A
  • no progesterone after menopause
  • bc woman is not ovulating
    There is no progesterone production after menopause

    this is because the woman is no longer ovul
    ating, and thus there is no corpus
    luteum

    the corpus luteum is the only source of progesterone in the bod