8.5: Reproductive Hormones

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8.5 Reproductive Hormones

• Male Reproductive System
• Female Reproductive System

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Male Reproductive System
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Male Reproductive System
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Male Hormones

• Aldosterone
• Testosterone (produced by interstitial cells)
• Stimulates spermatogenesis
• Maturation of testes, penis and sex drive
• Facial/body hair, lowering of voice, muscle
  development, secretion of body oils

Hormonal control of Sexual behaviour
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Male Hormones Contd

• Gonadotropin
• Produced by pituitary regulates testis
• FSH (Follicle-Stimulating Hormone)
• Stimulates sperm production in seminiferous
  tubules
• LH (Luteinizing Hormone)
• Production of testosterone by interstitial cells
• GnRH (Gonadotropin-Releasing Hormone)
• Stimulates pituitary to release FSH and LH
• Secreted by hypothalamus during puberty

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Male Hormone Control
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Female Reproductive System
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Female Reproductive System
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Oogenesis and Ovulation

• Each ovary contain approximately 400 000
  follicles (contain egg and release estrogen) at
  puberty.
• Between the ages of 12-50 400 eggs will mature.
• At menopause, only a few follicles remain and
  this marks the end of reproductive life.
• Meiosis 1 occurs during ovulation, meiosis 11
  occurs after ovulation.
• Ovulation Release of egg from follicle
• Corpus Luteum mass of follicle within ovary
  that releases estrogen and progesterone.

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Menstrual Cycle
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Female Hormones
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Female Hormone Control
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Male/Female Hormones

• Androgens (male sex hormones) and Estrogen
  (female sex hormones can be produced by either
  gender.
• Male characteristics result because the levels of
  androgen exceed the levels of estrogen.

Questions pp. 399 1-3, 5, 7, 9 12