Precocious Estrus and Reproductive Ability Induced by PG 600 in Prepuberal Gilts.

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概要

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• A total of 29 SPF Large White prepuberal gilts (mean age 152 days at treatment) were examined for estrous and ovulatory responses after PG 600 treatment. After treatment, 85.2% of the gilts showed standing estrus within 6 days. Whereas the treatment-to-estrus interval and duration were 3.7 and 1.9 days respectively. As ovulation occurred on Day 5 to 6, appropriate timing of artificial insemination would be about 4 days after treatment. Fertility of gilts revealed to be excellent, giving rise to a high percentage of normal embryos, 85.3%. Meanwhile, development and growth of fetuses were mostly normal. Other reproductive performances recorded were: mean litter size 6.8; mean birth weight 1.26 kg; weaning-to-return estrus interval 5 to 8 days. In conclusion, PG 600 was found to be useful in inducing fertile estrus in prepuberal gilts, a result which will be of interest for commercial pig farms.

• 公益社団法人 日本獣医学会の論文

著者

• OGASA Akira

  Nippon Veterinary and Animal Science University, 2-1 Kyonancho, Musashino, Tokyo 180-0023, Japan

関連論文

• Precocious Estrus and Reproductive Ability Induced by PG 600 in Prepuberal Gilts.

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