Cosentino Isabel Oliveira, Balaro Mário Felipe Alvarez, Menchaca Alejo, Perez-Clariget Raquel, Ungerfeld Rodolfo, Brandão Felipe Zandonadi
Faculdade de Veterinária, Universidade Federal Fluminense, Niterói, RJ, Brasil.
Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo, Uruguay.
Anim Reprod. 2023 Apr 14;20(1):e20220111. doi: 10.1590/1984-3143-AR-2022-011. eCollection 2023.
Hormonal methodologies to control small ruminants' estrous cycle are worldwide used and evolved, adjusting the application to the precise female physiological moments to enhance reproductive performance. The estrous cycle can be induced and/or synchronized, aiming for fixed-time artificial insemination, or based on estrus behavior signs for insemination, natural or guided mating. Successive protocols can be performed to resynchronize ovulation and increase reproductive outcomes in females that failed to conceive. These recently developed treatments aim to resynchronize the ovulation as earlier as non-pregnancy is detected. The present review aimed to summarize the recent advances and main findings regarding resynchronization protocols used in small ruminants. Lastly, we present future perspectives and new paths to be studied in the subject. The resynchronization treatment is still a growing field in small ruminant reproduction, nevertheless, some enhancements are found in the reproductive outcome, showing that such protocols can be successfully used in sheep and goat production.
控制小型反刍动物发情周期的激素方法在全球范围内得到应用和发展，根据雌性动物精确的生理阶段调整应用方式，以提高繁殖性能。发情周期可以被诱导和/或同步化，目的是进行定时人工授精，或者根据发情行为迹象进行授精，包括自然交配或引导交配。可以执行连续的方案来重新同步排卵，并提高未受孕雌性动物的繁殖成功率。这些最新开发的治疗方法旨在一旦检测到未怀孕就尽早重新同步排卵。本综述旨在总结小型反刍动物再同步化方案的最新进展和主要发现。最后，我们提出了该主题未来的研究方向和新的研究途径。再同步化治疗在小型反刍动物繁殖领域仍是一个不断发展的领域，不过，繁殖结果有了一些改善，表明此类方案可成功应用于绵羊和山羊生产。
