10- The end of reproductive life Flashcards
what is mensopause
the ceasing of menstruation.
greek menopause translation
- From the Greek “mens” meaning “monthly’’ and
- “pausis” meaning “cessation”.
- Menopause is a part of a women’s natural ageing process
- It is when her ovaries produce lower level of the oestrogen and progesterone
- She is therefore no longer able to become pregnant.
basic physiology behind menopause
Normal decline in ovarian function due to ageing begins in most women between ages 45 to 55 on average 50
Results in infrequent ovulation
Decreased menstrual function and eventually cessation of menstrual function and eventually cessation of menstruation
2 definitions for menopause
- Permanent cessation of menstruation at the end of reproductive life due to loss of ovarian follicular activity
- Defo of menopause: defined as the time when there has been no menstrual periods for 12 consecutive month and no other biological or physiological cause can be identified
early menopause
premature menopause
Physiologic menopaus
Pathologic menopause
The gradual or abrupt cessation of menstruation before 40 years occurs idiopathically in about 5% of women in USA
how many menopausal phases
Phase broken down into four categories
- Premenopausal slight changes in FSH/LH levels but cycle will be relatively normal)
- Peri-menopausal (transition menopause starts to happen to the cycle)
- Menopause
- Post menopause
FSH is big indicator that menopause is taking place- but no follicle left to stimulate
pre-menopause definition
peri-menopause
climacteric
physiological period in a womens life where there is regression of ovarian function
post menopause
which hormone is the biggest indicator that menopause is taking place
reproductive ageing graph
why do levels of oestrogen decrease before and during menopause
- by 45 years old only a few primordial follicles (producing oestrogen) remain to be stimulated by FSH and LH
*
why do we see an increase in FSH (esp) and LH
When oestrogen production falls below a critical value (few primordial follicles remaining) the oestrogens can no longer inhibit production of gonadotrophin (FSH and LH)
as women age the quantitu and quality of ovarian follicle pool
summary of the cause of menopause
Menopause occurs when the ovaries are totally depleted of follicles and no amount of stimulation from gonadotrophins (LH and FSH) can force them to work
i.e primary ovarian failure
Cessation of menstrual cycles
Average age ~50, but variable
No more follicles to develop
Oestrogen levels fall dramatically
FSH & LH levels rise, FSH dramatically
No inhibin
FSH levels rise dramatically due to there being
no inhibin
gonadotrophins (LH and FSH) during menopause
physiological symptoms of menopause
bloating caused by
Loss of oestrogen = loss of smooth muscle tone in the gut, leads to bloating or constipation