Arrebola Francisco A, Torres-Martell Rafael, González-Casquet Olga, Meza-Herrera Cesar A, Pérez-Marín Carlos C
Instituto de Investigación y Formación Agraria y Pesquera (IFAPA), Carretera el Viso, km 2, 14270 Hinojosa del Duque, Spain.
Diputación de Cádiz, 11400 Jerez de la Frontera, Spain.
Animals (Basel). 2022 Oct 20;12(20):2853. doi: 10.3390/ani12202853.
Sexual activity in domestic goats is positively influenced by reducing the photoperiod. Various protocols have therefore been developed in goats for the induction and synchronization of estrus during those months in which their sexual activity is reduced. The present observational study evaluates the periovulatory hormonal profile in Payoya goats (n = 24), during a non-favorable photoperiod (i.e., spring), being treated for estrus induction. The treatment comprised the vaginal insertion of sponges impregnated with progestogen (fluorogestone acetate, FGA), together with cloprostenol and equine chorionic gonadotrophin (eCG), 48 h before the end of the treatment. When the treatment ended, the plasma concentrations of the LH, FSH, progesterone and estradiol were determined. The goats were inseminated 46 h after the sponge withdrawal, and a pregnancy diagnosis was carried out 40-45 days after the insemination. Various parameters were monitored, such as the peaks of luteinizing hormone (LH), follicle-stimulating hormone (FSH) and estradiol, and their respective intervals, in reference to the time of the sponge withdrawal. The conception rate was 62.5%, and the kidding rate was 50%. The results record the hormonal release pattern after the estrus synchronization treatment based on the FGA, and the differences between the pregnant and non-pregnant goats. The findings suggest that the LH peak produced after the estrus synchronization treatment, both in terms of the amplitude and the time of increment, is involved in the reproductive failure detected.
缩短光照周期对家养山羊的性行为有积极影响。因此，人们制定了各种方案，用于在山羊性活动减少的月份诱导发情并使其同步。本观察性研究评估了在不利光照周期（即春季）接受诱导发情治疗的帕约亚山羊（n = 24）的围排卵期激素水平。治疗方法包括在治疗结束前48小时经阴道插入浸有孕激素（醋酸氟孕酮，FGA）的海绵栓，同时注射氯前列醇和马绒毛膜促性腺激素（eCG）。治疗结束时，测定血浆中促黄体生成素（LH）、促卵泡生成素（FSH）、孕酮和雌二醇的浓度。在取出海绵栓后46小时对山羊进行授精，并在授精后40 - 45天进行妊娠诊断。参照取出海绵栓的时间，监测了各种参数，如促黄体生成素（LH）、促卵泡生成素（FSH）和雌二醇的峰值及其各自的间隔时间。受孕率为62.5%，产羔率为50%。结果记录了基于FGA的发情同步治疗后的激素释放模式，以及怀孕和未怀孕山羊之间的差异。研究结果表明，发情同步治疗后产生的LH峰值，无论是幅度还是增加时间，都与所检测到的生殖失败有关。
