Abstract Fixed-time artificial insemination (FTAI) and hormonal superovulation (SOV) are instrumental in enhancing genetic gain and productivity of commercial goat herds. The goal of this study was to document changes in antral follicle populations and ovulation in dairy Saanen does. Fifty-six animals received MAP sponges that were left in place for 6 days as well as 200 IU of eCG and 120 μg of cloprostenol i.m. 24 h before sponge withdrawal. Does were randomly divided into three groups: Gcon (n = 18) received 1 mL of saline 28 h after, whereas G28h (n = 19) and G34h (n = 19) received 25 μg of lecirelin i.m. 28 h or 34 h after sponge removal. Estrus was detected with intact bucks every 12 h and transrectal ovarian ultrasonography was carried out from the time of sponge removal until ovulation detection (8/8 h – 60 h after sponge removal) and then until 156 h after sponge withdrawal (12/12 h). There were no differences (P > 0.05) among GnRH-treated and control goats in estrus responses (G28h–57.9%; G34h–84.2%; Gcon–83.3%) and mean ovulation rates (G28h–100%; G34h–91.7%; Gcon–81.8%), but the intervals from MAP sponge withdrawal to ovulation and from the estrus onset to ovulation were less variable (P

中文翻译：

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在孕激素预处理后 28 小时或 34 小时，接受短期排卵诱导方案和单次注射 Lecirelin（GnRH 类似物）的 Saanen 奶山羊的卵巢活性

摘要 定时人工授精 (FTAI) 和激素超排卵 (SOV) 有助于提高商业山羊群的遗传增益和生产力。本研究的目的是记录 Saanen 乳制品中窦卵泡数量和排卵的变化。56 只动物接受留置 6 天的 MAP 海绵以及 200 IU eCG 和 120 μg 氯前列醇 im 在海绵撤除前 24 小时。随机分为三组：Gcon（n = 18）在 28 小时后接受 1 mL 盐水，而 G28h（n = 19）和 G34h（n = 19）在海绵后 28 小时或 34 小时接受 25 μg lecirelin移动。每12小时检测一次完整的雄鹿发情，并从海绵取出至排卵检测（海绵取出后8/8-60小时）和海绵取出后156小时（12/12小时）进行经直肠卵巢超声检查。 ）。在发情反应（G28h–57.9%；G34h–84.2%；Gcon–83.3%）和平均排卵率（G28h–100%；G34h–91.7%； Gcon–81.8%），但从 MAP 海绵撤出到排卵以及从发情开始到排卵的间隔变化较小（P