The relation between oestrus signs and probability of ovulation at dubious oestrus in gilts.

Authors

  • H. Boer
  • L.A. den Hartog
  • K. Boode
  • H.A.M. van der Steen
  • W.C. Melger
  • M.A. Posthumus

DOI:

https://doi.org/10.18174/njas.v37i2.16647

Abstract

680 gilts were studied from 168 days of age. Urine samples were collected 10-12 days after a "dubious" 1st oestrus. Of 188 gilts showing a dubious 1st oestrus, 14 produced urine samples with a creatinine concentration of <0.25 mg/ml; of these, 6 and 8 samples had a high and a low pregnanediol concentration resp. Of 174 urine samples with a creatinine concentration of >0.25 mg/ml, 99 and 75 samples had a high and a low pregnanediol concentration resp. It was concluded that 99 (57%) of gilts had an ovulatory 1st oestrus as indicated by high urine creatinine and pregnanediol concentrations. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1989-06-01

Issue

Vol. 37 No. 2 (1989)

Section

Papers

License

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