排卵
卵泡期
人工授精
人绒毛膜促性腺激素
促排卵
促黄体激素
促性腺激素释放激素
马绒毛膜促性腺激素
受精
激素
医学
促性腺激素
生物
内科学
内分泌学
男科
怀孕
精子
遗传学
作者
María Victoria Falceto,Andrés Suárez-Usbeck,María Teresa Tejedor,Raquel Ausejo,Ana María Garrido,Olga Mitjana
摘要
Protocols for fixed-time artificial insemination (FTAI) in swine reproduction can help increase genetic improvement and production efficiency. Different gonadotropin-releasing hormone (GnRH) agonists have been developed to gain better control of follicular development, timing, and ovulation quality; therefore, they have been extensively used in FTAI protocols. This literature review resumes the most important characteristics of the physiology of follicular development and ovulation in sows, followed by a discussion about the hormonal alternatives available to induce ovulation (human chorionic gonadotropin, hCG; porcine luteinizing hormone, LH and GnRH agonists). Also, ovulation induction failures with GnRH agonists are described. Finally, current FTAI protocols with GnRH agonists are resumed and discussed. FTAI with GnRH agonists has proven to be an efficient, successful reproductive protocol that can be implemented in pig farms due to better knowledge of an endocrine system that regulates follicular development and ovulation and increased availability of several GnRH agonists that allow more efficient reproductive swine programs.
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