The Menstrual and The Menstrual and Ovarian Cycles Ovarian Cycles The Truth behind PMS!! The Truth behind PMS!!
The Menstrual and Ovarian Cycles
Jan 10, 2016
The Menstrual and Ovarian Cycles. The Truth behind PMS!!. What is going on all at once?. The Beginning and the End: Menstruation. Occurs if egg is not fertilized Days 1- 5 Corpus luteum (yellow body) breaks down This causes drop in estrogen and progesterone Uterine lining sheds - PowerPoint PPT Presentation
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The Menstrual and The Menstrual and Ovarian CyclesOvarian Cycles
The Truth behind PMS!!The Truth behind PMS!!
What is going on all at What is going on all at once?once?
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
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
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!
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
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