Hypothalamic-Pituitary-Gonadal Axis - Columbia University · 2010-03-02 · EVALUATION OF...
Transcript of Hypothalamic-Pituitary-Gonadal Axis - Columbia University · 2010-03-02 · EVALUATION OF...
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Hypothalamic-Pituitary-Gonadal Axis
Kisspeptin+
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Germ Cells in the Ovary Throughout Lifey g
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Puberty and Pattern of LH Secretion
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Follicular DevelopmentFollicular Development
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EVALUATION OF AMENORRHEA
• Is the patient pregnant?
• Is she making estrogen?
• If low estrogen, are gonadotropins high indicating ovarian failure or low indicating a hypothalamic or it it bl ?pituitary problem?
• If high estrogen, does she make progesterone? Are there disorders of the uterus or outflow tract? Arethere disorders of the uterus or outflow tract? Are androgens elevated?
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INDICES OF ESTROGEN SECRETION
• Breast development• Body fat distributionBody fat distribution• Bone maturation
V i l ll ifi ti• Vaginal cell cornification• Cervical mucus• Proliferative endometrium• Withdrawal bleeding after progesteroneWithdrawal bleeding after progesterone
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INDICES OF PROGESTERONE SECRETIONC S O OG S O S C O
• Increase in basal body temperature
• Cervical mucus becomes more viscous• Cervical mucus becomes more viscous
• Secretory endometrium
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INDICES OF ANDROGEN SECRETION
• Hirsutism• Acne• Temporal balding• Voice deepeningp g• Changes in body habitus• ClitoromegalyClitoromegaly• Menstrual dysfunction
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CAUSES OF INCREASED ANDROGEN C US S O C S OG
SECRETION
• Polycystic ovarian disease
• Androgen producing tumors of the ovary
• Cushing's syndromeCushing s syndrome
• Adrenal hyperplasia
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CLINICAL SYMPTOMS OF POLYCYSTIC C C S O S O O C S C
OVARIAN DISEASE
• Amenorrhea• Dysfunctional bleeding• Hirsutism• Infertility• ObesityObesity
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Polycystic Ovarian Syndrome
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BIOCHEMICAL FEATURES OF POLYCYSTIC OC C U S O O C S C
OVARIAN DISEASE
• LH:FSH ratio
• Estrogen• Estrogen
• Androgens
• Sex hormone binding globulin
I li i t• Insulin resistance
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Pathophysiological Characteristics of the Polycystic Ovary Syndrome
Insulin
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Pathophysiological Characteristics of the Polycystic Ovary Syndrome
Nestler J. N Engl J Med 2008;358:47-54
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OBJECTIVES IN TREATMENT OF POLYCYSTIC
OVARIAN DISEASE
• Restoration of fertility
• Treatment of hirsutism
• Treatment of endometrial hyperplasiaTreatment of endometrial hyperplasia
• Treatment of metabolic syndrome
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Hypothalamic-Pituitary-Gonadal Axis
Kisspeptin+
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CAUSES OF HYPOTHALAMIC AMENORRHEA
• Diet/Weight Loss
• Exercise
• StressStress
• Hyperprolactinemia
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Effect of Stress (Noise of Drilling) on LH Secretion in Ovariectomized Monkeysy
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T S d 45X G d l D iTurner Syndrome: 45X Gonadal Dysgenesis
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CLINICAL PROBLEMS ASSOCIATED WITH C C O S SSOC
ESTROGEN DEFICIENCY
• Vasomotor symptoms
• Genitourinary changes• Genitourinary changes
• Osteoporosis
• Lipid and cardiovascular effects
? CNS ff t• ? CNS effects
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CONSIDERATIONS FOR ESTROGEN CO S O S O S OG
REPLACEMENT
• Clinical symptoms
• Risk of osteoporosis
• Risk of breast cancerRisk of breast cancer
• Risk of endometrial cancer
• Risk of cardiovascular disease