Abstract The sudden introduction of males to anestrous females stimulates synchronous ovulations. The effectiveness of males to induce this response is androgen dependent. The aim of the present study was to compare the reproductive response of anestrous does to the introduction of teaser bucks treated with or without deslorelin implants, which continuously release a GnRH agonist. While 5 bucks were acutely treated with a single subcutaneous implant containing 7.4 mg of deslorelin (Suprelorin, Virbac) (group Des), other 5 bucks remained as controls (group Con). Each buck was placed with one group of 8 adult females. Deslorelin implants were inserted on Day -6 and from Day 0 to Day 9, bucks were joined with females from 07:00 to 08:00 and from 19:00 to 20:00 every day. Testosterone concentration was measured from blood samples collected twice a day (12 h apart, am/pm) on Days -11, -10, -9 and from Day -6 to Day -1, and collected immediately after buck stimulation from Day 0 to Day 9. Does that came into estrus and that showed short estrous cycles was registered from Day 0 to Day 9. Transrectal ultrasound examination for recording cyclicity on basis of presence of corpus luteum was done between Days 22 and 27, whereas ultrasonographic pregnancy diagnosis was carried out on Day 49. Testosterone concentration was greater in Des than Con bucks before joining them with females (36.0 ± 7.6 nmol/L vs 15.0 ± 6.8 nmol/L; P = 0.04), but the difference disappeared when all the experiment was analyzed together. Non significant differences were observed in reproductive response of does stimulated by treated or control males. Therefore, we concluded that both treated and control bucks were fully capable of inducing reproductive activity in anestrous does.

中文翻译：

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使用 deslorelin 植入物进行短期治疗，以提高雄鹿在非繁殖季节后期刺激循环活动的能力

摘要 雄性突然引入无情雌性会刺激同步排卵。雄性诱导这种反应的有效性取决于雄激素。本研究的目的是比较无发情的雌性对引入用或不用 deslorelin 植入物治疗的传情雄鹿的生殖反应，后者持续释放 GnRH 激动剂。5 块钱用含有 7.4 毫克 deslorelin（Suprelorin、Virbac）（Des 组）的单个皮下植入物进行急性治疗，其余 5 块钱作为对照（Con 组）。每只雄鹿都放在一组 8 只成年雌性。在第 -6 天和第 0 天到第 9 天插入 Deslorelin 植入物，每天从 07:00 到 08:00 和从 19:00 到 20:00 将雄鹿与雌性结合。从第 -11、-10、-9 天和从第 -6 天到第 -1 天每天收集两次（间隔 12 小时，上午/下午）的血液样本测量睾酮浓度，并在降压刺激后从第 0 天到第第 9 天。从第 0 天到第 9 天记录是否进入发情期并显示发情周期短。在第 22 天和第 27 天之间进行经直肠超声检查以记录基于黄体存在的周期性，而进行超声妊娠诊断在第 49 天出来。 Des 中的睾酮浓度高于 Con bucks，然后再加入雌性（36.0 ± 7.6 nmol/L vs 15.0 ± 6.8 nmol/L；P = 0.04），但当所有实验一起分析时差异消失. 在受治疗或对照雄性刺激的生殖反应中观察到非显着差异。