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The Menstrual cycle The Menstrual cycle

The Menstrual cycle - PowerPoint Presentation

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Uploaded On 2017-10-19

The Menstrual cycle - PPT Presentation

Occurs every 28 days divided into 4 stages Menarche age of first period Starts puberty some as young as 9 and as late at 17 years Avg age bt 12 amp 15 Facts Amenorrhea absence of menstrual cycle ID: 597407

amp stage pituitary menstrual stage amp menstrual pituitary fsh follicle days luteum secretion estrogen progesterone menstruation corpus breaks day endometrium ovulation ruptured

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Presentation Transcript

Slide1

The Menstrual cycleSlide2

Occurs every 28 days, divided into 4

stagesMenarche = age of first periodStarts @ puberty – some as young as 9 and as late at 17 yearsAvg age b/t 12 & 15

FactsSlide3

Amenorrhea

– absence of menstrual cycleCauses: psychological factors, anorexia, hormonal imbalance, pregnancyMenorrhagia – abnormally heavy & long menstrual periodsPrementrual Syndrome (PMS)

– group of

sx prior to ones menstrual cycle Cause: water retention in body tissue. Sx: irritability, nervousness, mood swings, weight gainDysmenorrhea – painful menstruation

Menstruation disordersSlide4

FSH from

pituitary to ovary stimulates follicle with ovum to maturereleases estrogen and prepares uterine lininglasts 10 days

Stage 1:

Follicle StageSlide5

When the concentration of estrogen in the female bloodstream reaches a high level – it causes the pituitary gland to stop FSH secretion.

LH is secreted by pituitary glandNow estrogen, FSH, & LH circulating which causes release of mature follicleUsually around day 14Stage 2:Ovulation stageSlide6

Corpus

luteum (group of ruptured follicle cells) secretes progesterone.which prevents further ovulation and maintains uterine lining for possible embryolasts 14 daysStage 3

Corpus

Luteum StageSlide7

If fertilization does not occur :

-progesterone reaches a level in bloodstream that inhibits LH secretion & corpus luteum breaks down causing a decrease in progesterone secretion. -Lining of the endometrium becomes progressively thinner and eventually breaks down. -Extra layers of endometrium, unfertilized egg, & small quantity of blood from ruptured capillaries are discharged through the vagina. -Starts around day 28 of

cyele

and lasts about 4-5 days. -Anterior pituitary now stimulated to secrete FSH for a new follicle and the cyle starts over. Stage 4:menstruation stage