Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Estimation of Ovulation and Optimal Breeding Time Based on Reproductive Hormone in Shih-tzu Bitches

Shin-tzu견에서 혈장 Progesterone과 Estradiol-$17{\beta}$ 농도 측정에 의한 배란시기 및 교배적기의 추정

  • Kim Bang-sil (College of Veterinary Medicine, Chonnam National University) ;
  • Lee Sun-ae (College of Veterinary Medicine, Chonnam National University) ;
  • Ko Jin-sung (College of Veterinary Medicine, Chonnam National University) ;
  • Hwang Sun-shin (College of Veterinary Medicine, Chonnam National University) ;
  • Park Chul-ho (College of Veterinary Medicine, Chonnam National University) ;
  • Oh Ki-seok (College of Veterinary Medicine, Chonnam National University) ;
  • Kim Jong-taek (Department of Veterinary Medicine, Kangwon National University) ;
  • Park In-Chul (Department of Veterinary Medicine, Kangwon National University) ;
  • Kim Young-hong (College of Veterinary Medicine, Kyungpook National University) ;
  • Son Chang-ho (College of Veterinary Medicine, Chonnam National University)
  • Published : 2005.09.01
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Abstract

The aim of this study was to estimate the time of ovulation and mating derived by plasma progesterone and estradiol-$17{\beta}$ concentrations. The 11 pregnant Shih-tzu bitches were investigated the plasma progesterone and estradiol-$17{\beta}$ concentrations from proestrus to parturition. Gestation length in the 11 pregnant bitches was $61.9{\pm}1.1\;(mean{\pm}SD)$ days when Day 0 was timed from the day that plasma progesterone concentration was first increased above 4.0 ng/ml. The litter size was $3.8{\pm}0.3$ pups. Plasma progesterone concentrations were increased at the first day of vulvar bleeding and showed at Day 0 with $5.2{\pm}0.3$ ng/ml. It was gradually increased to reach a peak at Day 15 with $42.6{\pm}3.7ng/ml$, thereafter it was gradually decreased to below Day 62. Plasma estradiol-$17{\beta}$ concentrations were increased above 1.0 pg/ml at the first day of vulvar bleeding and showed a peak at Day -2 with $33.5{\pm}8.0$ pg/ml, thereafter it was gradually decreased. When Day 0 was timed from the day that plasma progesterone concentration was first increased above 4.0 ng/ml, plasma estradiol-$17{\beta}$ concentration reached a peak at Day -2. In conclusion, these results indicated that ovulation was estimated to occur the day when plasma progesterone concentration was first increased above 4.0 ng/ml after the first day of bleeding. It was estimated that mating time was the day when plasma progesterone concentration was between $3.0{\~}8.0$ ng/ml.

Keywords

References

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