Davis D L, Stevenson J S, Schmidt W E
J Anim Sci. 1985 Mar;60(3):599-602. doi: 10.2527/jas1985.603599x.
Fertility of 104 gilts artificially inseminated (AI) at a predetermined time (scheduled AI) after estrous synchronization with altrenogest (15 mg X gilt-1 X d-1 for 18 d) was compared with that of 103 gilts checked for estrus (estrus checked) and inseminated after altrenogest. Scheduled-AI gilts were inseminated once on d 5, 6 and 7 after the last altrenogest feeding (d 0). Estrus-checked gilts were exposed to a boar twice daily at 0830 and 1630 h and inseminated after the second and third estrous detection period following first detected estrus. Percentage of gilts assigned to treatment that farrowed (72.8 vs 67.3%), total pigs farrowed (11 +/- .4 vs 11.3 +/- .4) and pigs born alive (10.1 +/- .4 vs 10.5 +/- .4) were similar for estrus-checked and scheduled-AI gilts, respectively. We conclude that scheduled AI can be used with estrous synchronization for gilts and may have advantages in breeding herd management and the use of AI in swine.
将104头后备母猪在与烯丙孕素（15毫克/头/天，共18天）同步发情后于预定时间进行人工授精（定时人工授精），其繁殖力与103头经烯丙孕素处理后检查发情（发情检查）并进行人工授精的后备母猪进行比较。定时人工授精的后备母猪在最后一次投喂烯丙孕素（第0天）后的第5、6和7天各进行一次人工授精。发情检查的后备母猪每天0830和1630时各与公猪接触一次，并在首次检测到发情后的第二和第三个发情检测期后进行人工授精。发情检查和定时人工授精的后备母猪中，产仔的后备母猪比例（分别为72.8%和67.3%）、总产仔数（分别为11±0.4头和11.3±0.4头）以及活产仔数（分别为10.1±0.4头和10.5±0.4头）相似。我们得出结论，定时人工授精可与后备母猪发情同步化一起使用，并且在种猪群管理和猪的人工授精应用方面可能具有优势。
