# data[].attributes.body
After progesterone levels decline, the endometrium begins to degenerate.

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the endometrial cells enlarge causing the endometrium to reach full development

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Progesterone secretion rapidly declines.

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Degeneration after about day 25.

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Smaller amounts of estrogen.

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Large amounts of progesterone.

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Follicle is converted to corpus luteum.

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Inhibit FSH and LH secretion.

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High levels of estrogen and progesterone.

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Contractions of the smooth lining of the womb.

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Estrogen and progesterone levels decrease rapidly.

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Egg disintegrates.

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In preparation for egg fertilization.

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Day 14-28

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Endometrium continues to divide.

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FSH causes several immature follicles to enlarge.

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LH causes final maturation of a mature follicle that initiates ovulation.

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Results to positive-feedback cycle.

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Stimulate estrogen secretion.

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FSH and LH secretion increases rapidly.

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Day 14

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Endometrium of the uterus thickens.

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Day 1-14

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Estrogen and progesterone secretions are low.

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FSH and LH secretions are low.

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Endometrial lining sloughs off.

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Day 1-5

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FSH and LH secretions are slightly elevated.

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Increased estrogen secretion.

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Increase sensitivity to progesterone.

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Endometrial cells of the uterus divides.

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Formation of tube-like glands.

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- Occurs immediately after ovulation.

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Maturation of Follicle.

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Peak of estrogen.

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Menstrual fluid leaves out of the vagina.