| Estimation of the time of ovulation and mating based on plasma progesterone concentrations in Korea Jin-do bitches |
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Chang-ho Son1, Byong-kyu Kang2, Han-sun Choi2, Na-kyung Lee2, Chang-rok Shin2, Ho-jae Han1, Yong-dal Yoon3 |
1College of Veterinary Medicine, Hormone Research Center, Chonnam National University
2College of Natural Science, Hanyang University
3Hormone Research Center of Chonnam National University |
| 진도개에서 혈장 progesterone 농도측정에 의한 배란시기 및 교배적기의 추정 |
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손창호1, 강병규2, 최한선2, 이나경2, 신창록2, 한호재1, 윤용달3 |
1전남대학교 수의과대학, 호르몬연구센터
2한양대학교 자연과학대학
3전남대학교 호르몬연구센터 |
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| Abstract |
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The aim of this study was to assess the estimates of the time of ovulation and mating derived by plasma progesterone concentration. The 40 mature Korea Jin-do bitches were monitored to determine the plasma progesterone concentrations from proestrus to parturition. Gestation length in the 30 pregnant bitches was $63.9{pm}2.3$ ($mean{pm}SD$) days in multiparous bitches and $61.8{pm}3.6$ days in primiparous bitches when Day 0 was timed from the first day of male acceptance, and $61.4{pm}1.8$ days and $61.3{pm}2.7$ days when Day 0 was timed from the day of first mating, respectively. Also, gestation length was $63.1{pm}1.4$ days, $62.4{pm}1.1$ days and $61.5{pm}0.9$ days in multiparous bitches, and $62.6{pm}1.4$ days, $62.4{pm}2.0$ days and $61.6{pm}2.3$ days in primiparous bitches when Day 0 was timed from the day that plasma progesterone concentration was first increased above 2.0, 3.0 and 4.0ng/ml, respectively, and $53.8{pm}3.1$ days and $54.8{pm}2.6$ days when Day 0 was timed from the last day of male acceptance, respectively. In 30 pregnant bitches, plasma progesterone concentration was $0.2{pm}0.2ng/ml$ in multiparous bitches and $0.7{pm}0.8ng/ml$ in primiparous bitches at the first day of vulval bleeding, $1.9{pm}1.0$ and $3.3{pm}2.7ng/ml$ at the first day of male acceptance, $7.0{pm}4.0$ and $9.3{pm}6.2ng/ml$ at the day of first mating, and $25.1{pm}6.3$ and $22.8{pm}10.3ng/ml$ at the last day of male acceptance, respectively. When Day 0 was timed from the day of parturition, plasma progesterone concentration at Day -62, Day -63 and Day -64 was $4.7{pm}2.7ng/ml$, $3.5{pm}2.2ng/ml$ and $1.7{pm}0.9ng/ml$ in multiparous bitches, and $5.3{pm}4.4ng/ml$, $3.2{pm}3.7ng/ml$ and $2.0{pm}1.9ng/ml$ in primiparous bitches, respectively. When Day 0 was timed from the day that plasma progesterone concentration was first increased above 3.0ng/ml after the first day of vulval bleeding, plasma progesterone concentration at Day 61 and Day 62 was $2.7{pm}2.2ng/ml$ and $1.4{pm}1.9ng/ml$ in multiparous bitches, and $3.4{pm}5.2ng/ml$ and $3.7{pm}5.6ng/ml$ in primiparous bitches, and $0.8{pm}0.7ng/ml$ and $0.9{pm}0.4ng/ml$ at Day 63, respectively. It was that bitches were mated when plasma progesterone concentraion was 1.9 to 14.2ng/ml and 3.5 to 20.0ng/ml in multiparous and primiparous bitches, which was between first day before ovulation and fourth day after ovulation. And pregnancy rate was 92% (23/25). From these data, ovulation was estimated to occur the day when plasma progesterone concentration was first increased above 3.0ng/ml after the first day of vulval bleeding. It was estimated that mating time was the day when plasma progesterone concentration was between 1.9 and 20.0ng/ml, and best time for mating was between 3.0 and 8.0ng/ml of plasma progesterone concentration. |
| Key Words:
progesterone, ovulation time, mating time, Korea Jin-do dog |
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