the menstrual and ovarian cycles the truth behind pms!!
TRANSCRIPT
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The Menstrual and The Menstrual and Ovarian CyclesOvarian Cycles
The Truth behind PMS!!The Truth behind PMS!!
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What is going on all at What is going on all at once?once?
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The Beginning and the End: The Beginning and the End: MenstruationMenstruation
Occurs if egg is not fertilizedDays 1- 5 Corpus luteum (yellow body) breaks down– This causes drop
in estrogen and progesterone
Uterine lining shedsFSH increases during
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Phase 2: Follicular PhasePhase 2: Follicular PhaseDays 5 –13Low estrogen = FSH to be releasedThis stimulates growth of follicle– Egg begins to
matureFollicle matures causing estrogen levels up– Uterine lining
begins to thicken again
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Phase 3: OvulationPhase 3: Ovulation
Days 13-15Sudden rush of FSHMajor SPIKE of LH– This causes
follicle to break and release egg into fallopian tube
FERTILIZATION MOST LIKELY TO OCCUR AT END OF OVULATION!
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Phase 4: Luteal PhasePhase 4: Luteal Phase
Days 15-28LH and FSH levels crashCorpus luteum forms from broken follicleCorpus luteum secretes estrogen and progesterone– This thickens uterine
lining to prepare for egg