Synchronization of ovulation and artificial insemination of sows after lactation.
Synchronization of ovulation and artificial insemination of sows after lactation.
复制标题
母猪泌乳后排卵与人工授精同步。
DOI：
10.2527/jas1975.412560x
复制
发表时间：
1975
影响因子：
3.3
通讯作者：
H. S. Teague
中科院分区：
文献类型：
--
作者：
R. Christenson;H. S. Teague
PMS:HCG 的施用被证明是一种令人满意的同步母猪泌乳 3 或 6 周后发情和排卵的方法，并且允许一次性人工授精，而不依赖于发情检测。 58 头杜洛克母猪在 3 周或 6 周龄断奶时被随机分配为对照组或激素治疗组。二十九头母猪（第一组）未接受任何治疗，并在发情开始后 24 小时进行授精。 29 头母猪（第 II 组）在断奶后第二天早上皮下注射 1,000 IU PMS，随后在注射 PMS 后 72 小时（断奶 3 周）或 56 小时（断奶 6 周）肌肉注射 500 IU HCG。 HCG 注射后 24 小时对第 II 组母猪进行授精。所有母猪在妊娠约 30 天时被屠宰。处理母猪的发情期仅限于 2 天，而对照母猪的发情期则为 7 天。在 HCG 给药后 24 小时授精的 PMS:HCG 治疗母猪和发情开始后 24 小时授精的对照母猪观察到相同的妊娠率 (96%)，表明断奶后激素治疗成功同步排卵。 PMS：HCG 处理显着提高了配种后 30 天的排卵率和产仔数 (P<.01)。 （
The administration of PMS:HCG proved satisfactory as a method for synchronizing estrus and ovulation in sows after 3 or 6 weeks of lactation and permitted artificial insemination at one time without relying on the detection of estrus. Fifty-eight Duroc sows were assigned randomly as controls or to a hormonal-treatment group when their litters were weaned at 3 or 6 weeks of age. Twenty-nine sows (Group I) received no treatment and were inseminated 24 hr after the onset of estrus. Twenty-nine sows (Group II) received a subcutaneous injection of 1,000 IU of PMS the following morning after the litter was weaned and subsequently were injected intramuscularly with 500 IU of HCG either 72 hr (3-week weaning) or 56 hr (6-week weaning) after the injection of PMS. Group II sows were inseminated 24 hr after the HCG injection. All sows were slaughtered at approximately 30 days of gestation. The onset of estrus was confined to a 2-day period for treated sows and occurred over a 7-day period for control sows. The same pregnancy rate (96%) was observed for PMS:HCG-treated sows inseminated 24 hr after HCG administration, and for control sows inseminated 24 hr after the onset of estrus, indicating that hormonal treatment after weaning successfully synchronized ovulation. Ovulation rate and litter size at 30 days after breeding were significantly (P<.01) increased by PMS: HCG treatment. (