Estrous Cycle

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Estrous Cycle

• Topic 3096 C
• Amanda Trutsch

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Estrus

• The period of mating activity in the female
  mammal
• Same as heat

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Estrous

• An adjective meaning heat, which modifies such
  words as cycle
• Estrous cycle is the heat cycle, or time from one
  heat to the next

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Hormones involved

• Gonadotropin-releasing hormone (GnRH)
• Source Hypothalamus
• Target Anterior pituitary
• Function Release LH and FSH

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Hormones involved, cont.

• Luteinizing hormone (LH)
• Source Anterior pituitary
• Target Ovary
• Functions Ovulation, CL formation, Progesterone
  production

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Hormones involved, cont.

• Follicle-stimulating hormone (FSH)
• Source Anterior pituitary
• Target Ovary
• Function Development of follicle

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Hormones involved, cont.

• Estrogen
• Source Follicle
• Target Uterus
• Function Mating behavior

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Hormones involved, cont.

• Progesterone
• Source Corpus luteum
• Target Uterus
• Function Maintains pregnancy

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Hormones involved, cont.

• Prostaglandin (PGF2a)
• Source Uterus
• Target Corpus luteum
• Function Regression of CL

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Estrous Cycle
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