Veterinary Research Communications

, Volume 5, Issue 1, pp 77–84 | Cite as

Vaginal electrical resistance in cows: 2. Relationship to milk progesterone concentrations during the reproductive cycle

  • W. J. McCaughey
  • A. D. Patterson


When the vaginal electrical resistance (VER) was measured in the anterior vagina in 4 cows during a total of 12 oestrous cycles, there was a close correlation between VER, milk progesterone levels and visual observations of oestrus. The cyclic changes in both VER and milk progesterone ceased in 2 cows which became pregnant during the study. In a pregnant cow, the VER was found to be constant both pre-partum and immediately post-partum. These results show that measurement of VER can be a useful aid in the confirmation of oestrus and suggest that the technique may also be applicable to the early diagnosis of pregnancy.


Public Health Progesterone Early Diagnosis Veterinary Medicine Visual Observation 
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Copyright information

© Elsevier Scientific Publishing Company 1981

Authors and Affiliations

  • W. J. McCaughey
    • 1
  • A. D. Patterson
    • 2
  1. 1.Veterinary Research LaboratoriesBelfast(Northern Ireland)
  2. 2.Belfast(Northern Ireland)

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