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Prof G N Purohit
Estrous detection in cows
Physical methods
• Visual observations
• Record keeping
• Heat expectancy charts
• Marker Animals-Teaser bulls, Gomer
bulls
• Heat mount detectors- chalks, tail
painting, Kamar
• Plasma progesterone
• Cervical mucus fern pattern
Electronic devices
Vaginal electrical resistance
probes
Pedometers
Closed circuit camera
Pressure sensitive telemetric
devices
Visual observation
• Increased physical activity
• Bellowing
• Mounting
• Drop in milk yield
• Mucus discharge from vagina
• Redness and swelling of vulva
Timeline for Heat Signs in Cattle
. Coming into Heat Standing Heat Going out of Heat
. (8 hours) (18 hours) (14+ hours)
Heat Signs • Stands and
bellows
• Smells other
cows
• Head butts other
cows
• Attempts to ride
other cows but
will not stand to
be mounted
• Red, moist,
slightly swollen
vulva
• Clear mucous
discharge from
• Stands to be
mounted
• Rides other cows
• Bellows
frequently
• Nervous and
excitable
• Attempts to ride
other cows but
will not stand to
be mounted
• Smells other
cows
• Clear mucous
discharge from
vulva
When Cows Show Heat
Time
Cows showing heat
signs, per cent
6 am to noon 22 per cent
noon to 6 pm 10 per cent
6 pm to midnight 25 per cent
midnight to 6 am 43 per cent
Marker animals
• Vasectomised males
• Gomer Bulls
• Androgenized females
Heat mount detectors for cows
Tail Painting
Pressure sensitive Heat mount
detectors
Plasma/milk progesterone
• Daily sampling is required
• High cost
• Errors in interpretation
Cervical mucus fern pattern
Electronic devices
Vaginal
electrical
resistance
Pedometers
The SCR Heatime® HR System is a stand alone, long-distance, terminal-
based system that provides a complete reproduction and health monitoring
solution, with no PC required. It comprises robust, multi-functional neck
tags that each have a proprietary movement sensor and a rumination
recorder
Pressure sensitive radio
telemetric devices
• The above lectures are also explained in video
lectures at my YouTube Channel Govind
Narayan Purohit
• Kindly share the videos and subscribe to my
channel if you like them
• Thanks

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Lecture 4 estrus detection dairy cows

  • 1. Prof G N Purohit Estrous detection in cows
  • 2. Physical methods • Visual observations • Record keeping • Heat expectancy charts • Marker Animals-Teaser bulls, Gomer bulls • Heat mount detectors- chalks, tail painting, Kamar • Plasma progesterone • Cervical mucus fern pattern
  • 3. Electronic devices Vaginal electrical resistance probes Pedometers Closed circuit camera Pressure sensitive telemetric devices
  • 4. Visual observation • Increased physical activity • Bellowing • Mounting • Drop in milk yield • Mucus discharge from vagina • Redness and swelling of vulva
  • 5.
  • 6.
  • 7. Timeline for Heat Signs in Cattle . Coming into Heat Standing Heat Going out of Heat . (8 hours) (18 hours) (14+ hours) Heat Signs • Stands and bellows • Smells other cows • Head butts other cows • Attempts to ride other cows but will not stand to be mounted • Red, moist, slightly swollen vulva • Clear mucous discharge from • Stands to be mounted • Rides other cows • Bellows frequently • Nervous and excitable • Attempts to ride other cows but will not stand to be mounted • Smells other cows • Clear mucous discharge from vulva
  • 8. When Cows Show Heat Time Cows showing heat signs, per cent 6 am to noon 22 per cent noon to 6 pm 10 per cent 6 pm to midnight 25 per cent midnight to 6 am 43 per cent
  • 9. Marker animals • Vasectomised males • Gomer Bulls • Androgenized females
  • 10.
  • 11. Heat mount detectors for cows Tail Painting
  • 12.
  • 13. Pressure sensitive Heat mount detectors
  • 14.
  • 15.
  • 16.
  • 17.
  • 18. Plasma/milk progesterone • Daily sampling is required • High cost • Errors in interpretation
  • 22.
  • 23. The SCR Heatime® HR System is a stand alone, long-distance, terminal- based system that provides a complete reproduction and health monitoring solution, with no PC required. It comprises robust, multi-functional neck tags that each have a proprietary movement sensor and a rumination recorder
  • 24.
  • 26.
  • 27. • The above lectures are also explained in video lectures at my YouTube Channel Govind Narayan Purohit • Kindly share the videos and subscribe to my channel if you like them • Thanks