SFOS 82/83

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Author:
zf2010
ID:
90552
Filename:
SFOS 82/83
Updated:
2011-06-13 23:24:46
Tags:
Female Reproductive System
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Description:
SFOS 82/83
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  1. What are the functions of the ovary?
    • Generate mature oocytes
    • Produce steroid hormones
  2. Ovarian follicle
    Oocyte surrounded by follicle/granulosa cells
  3. Describe follicle development stages
    • Primordial follicles - oocyte and single follicular layer
    • Growing follicle
    • Vesicular follicle
    • Mature follicle
    • Corona Radiata detaches
  4. Describe ovulation
    • Meiosis I completed, first polar body released
    • Mature follicle ruptures - oocyte released
  5. What is an ovarian cyst?
    Follicle which fails to rupture and not reabsorbed
  6. Describe the process of luteinization
    Ovarian follicular cells and thecal cells form corpus luteum
  7. Hormones in the Follicular Phase
    • Growth promoted by increasing LH, FSH
    • Estrogen produced by granulosa cells - negative feedback to hypothalamus
  8. Hormones at Midcycle
    • Estrogen peaks - shift to positive feedback causing GnRH surge, LH surge, FSH surge
    • Stimulates ovulation
  9. Hormones in Luteal Phase
    • FSH and LH levels drop
    • Corpus leteum produces progesterone, estrogen and inhibin
    • If no pregnancy - low ovarian hormones ceases inhibition of hypothalamus
    • If pregnant - HCG maintains the corpus luteum
  10. What are the layers of the endometrium?
    • Functional layer - shed
    • Basal layer
  11. How do cervical secretions change during cycle?
    • Copius, watery at mid-cycle - favor sperm transport
    • Viscous during rest of cycle
  12. Nabothian cysts
    blocked cervical glands
  13. Phases of the endometrium
    • Proliferative Phase (5-14) - by estrogen
    • Secretory Phase (15-28) - by progesterone
    • Menstrual Phase (1-4) - by declining hormones
  14. Colostrum
    • Initial secretion from mammary glands
    • High in Vit A, Na, Cl, antibodies
  15. What are the components of the Placenta?
    • Villi from conceptus
    • Decidua from mother
  16. Elements of the Decidua
    • Decidua capsularis - covers the conceptus
    • Decidua basalis - underlies the conceptus
    • Decidua parietalis - endometrium where conceptus did not implant
  17. Placental endocrine functions
    • Prostaglandins - labor onset
    • Progesterone, Estrogen - maintains pregnancy
    • HCG - maintains corpus luteum
    • Relaxin - loosening of pelvic joints

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