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Menstrual Cycle

Menstrual Cycle . Menstrual Cycle. Series of changes in ovary and uterus Controlled by hormones Starts at puberty Ends at menopause ~28 day cycle. 4 Stages. 1. Follicle Stage Egg matures in follicle FSH- follicle stimulating hormone Follicle produces estrogen

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Menstrual Cycle

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  1. Menstrual Cycle

  2. Menstrual Cycle • Series of changes in ovary and uterus • Controlled by hormones • Starts at puberty • Ends at menopause • ~28 day cycle

  3. 4 Stages • 1. Follicle Stage • Egg matures in follicle • FSH- follicle stimulating hormone • Follicle produces estrogen • Estrogen thickens lining of uterus • Lasts ~10 days

  4. 2. Ovulation • Egg released from follicle (follicle breaks) • LH- leutinizing hormone • Egg picked up by fallopian tube • ~ day 14

  5. 3. Corpus Luteum Stage • After ovulation, follicle fills with yellow tissue corpus luteum • Corpus luteum produces progesterone • Progesterone increases blood supply • Lasts ~ 14 days

  6. 4. Menstruation • No fertilization= follicle breaks down • Produces less estrogen and progesterone • Lining of uterus shed • Lasts ~4 days

  7. Occurs in a cycle

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