Know your Menstrual Cycles!

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3 phases of the Menstrual Cycle

FOL

Follicular Phase (egg def)

  • egg development and estrogen secretion from the follicle occur

Ovulation (LH, egg)

  • increasing esterogen levels causes LH surge, causing release of egg into Oviduct/Fallopian Tubes

Luteal Phase (CL, PEE)

  • Corpus luteum secretes progesterone and estrogen to thicken endometrium

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Steps of the Menstrual Cycle

  1. LH and FSH promote follicle growth

    • Follicle secretes increasing estrogen

  2. Increased amounts of estrogen causes LH surge

  3. LH surge triggers ovulation

  4. Corpus luteum secretes progesterone and estrogen, prompting thickening of endometrium (PEE)

  5. Corpus luteum dissolve and hormone levels decrease leading to menustration

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What phase is Day 0-13?

Follicular Phase

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What day is phase 14?

Ovulation

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What day is phase 15-28?

Luteal phase