产次和窝仔数对比格犬妊娠期长度的影响。
Influence of parity and litter size on gestation length in beagle dogs.
作者信息
Seki Makoto, Watanabe Norio, Ishii Kenyo, Kinoshita Yoh-ichi, Aihara Takehiro, Takeiri Shuji, Otoi Takeshige
机构信息
Laboratory of Animal Reproduction, The United Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi, Japan.
出版信息
Can J Vet Res. 2010 Jan;74(1):78-80.
This study was conducted to investigate the effects of parity and litter size on gestation length in beagle bitches. The mean duration of the initial elevation (>2 ng/mL) in progesterone concentrations after the onset of proestrus was shorter (P < 0.05) in bitches without (nulliparous) whelping experience than in bitches with (multiparous) whelping experience (6.9 d versus 8.0 d). When calculated as the interval between the day of initial elevation in progesterone concentrations and the day of whelping, the gestation length in the nulliparous bitches was noted to be similar to that in the multiparous bitches (64.3 d versus 64.2 d). No significant correlation between gestation length and litter size was observed in any of the bitches. Our results indicate that the gestation length in beagle bitches is not affected by parity or litter size.
本研究旨在调查胎次和产仔数对比格犬妊娠期长度的影响。初情期开始后孕酮浓度首次升高（>2 ng/mL）的平均持续时间，未生育（初产）的母犬比有生育（经产）经验的母犬短（P < 0.05）（6.9天对8.0天）。当计算为孕酮浓度首次升高之日与分娩之日之间的间隔时，初产母犬的妊娠期长度与经产母犬相似（64.3天对64.2天）。在任何母犬中均未观察到妊娠期长度与产仔数之间存在显著相关性。我们的结果表明，比格犬的妊娠期长度不受胎次或产仔数的影响。
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