PP22 Estrous Detection Chapter 11 pg 240265

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PP22Estrous DetectionChapter 11 pg 240-265

• ANS 3319Dr. Michael J. FieldsUniversity of
  Florida

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Estrous ExpressionDetection of Estrus

• Period when female accepts male for mating.
• Female is restless, irritable, excitable.
• Estrogen main cause of display of estrus.

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Estrous ExpressionDetection of Proestrus

• Progesterone declines.
• Estrogen increases.
• Interest by female but no mating occurs.

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Endocrine Profile Peri-Estrus
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Estrous Expression-DetectionSow

• Presence of boar or recorded sounds of boar
  grunting will excite female in estrus.
• Pheromones of boar in glands sheath elicit
  stronger response.
• Lordosis - mating stance when pressure applied to
  back.
• Sows mount each other.

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Lordosis
www.ansc.purdue.edu
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Estrous Expression-DetectionSow

• No mucus.
• Winking of ears, swollen red vulva.
• Estrogen increases blood flow to reproductive
  tract.
• Aids - Intact or vasectomized boar,
  pheromone/estrogen spray to snout of female.

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Estrous Expression-DetectionMare

• Assumes mating stance - extends hind legs, lifts
  tail to side, lowers rump.
• Everts labia, exposes erect clitoris, frequent
  vulvular contractions, vulvular winking,
  urination.
• No cervical mucus.
• No female to female mounting.
• Aids - Tease mare with stallion (mare in
  stocks/chute), ultrasound, palpation.

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Estrous Expression-DetectionEwe

• No signs displayed without presence of ram.
• Ewe smells ram, shakes tail vigorously.
• Pheromones found in wax of wool stimulates
  estrus.
• Scent glands located near horns of rams.

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Estrous Expression-DetectionEwe

• No cervical mucus.
• Aids - Apron with a crayon or surgically modified
  male.

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Estrous Expression-DetectionCow

• Displays strong female to female mounting.
• Greater frequency of estrus expression in pm
  am.
• Holstein in heat 7.5 hr with 1 mount per hour.
• Group of two or more cows results in greater
  activity.
• Cow that stands to be mounted is in heat other
  cows will do mounting.

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Estrous Expression-DetectionCow

• The cow in heat will be restless, walking have
  mud on the back.
• There will be swelling of the vulva swishing of
  the tail.
• Cervical mucus is clear flows in streams.

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Estrous Expression-DetectionCow - Aids

• K-Mar heat detection patch - turns red.
• Heat watch - pressure patches with radio
  transmitter glued to back.
• Pedometer - Israeli motion monitor on leg.
• Gomer bull - surgically modified male Vasectomy
  or Epididectomy.
• Chin - Ball marker on bull or Androgenized cow.

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Estrous Expression-Detection

• The sense of touch is important to the mating
  response of all species - bunting, kicking,
  rubbing.