Pregnancy per AI in Holstein heifers inseminated with sex-selected or conventional semen after estrus detection or timed-AI

被引：0
|
作者：
Colazo, Marcos G. [1 ]
Mapletoft, Reuben J. [2 ]
机构：
[1] Alberta Agr & Forestry, Livestock Res Branch, Edmonton, AB T6H 5T6, Canada
[2] Univ Saskatchewan, Western Coll Vet Med, Dept Large Anim Clin Sci, Saskatoon, SK S7N 5B4, Canada
来源：
CANADIAN VETERINARY JOURNAL-REVUE VETERINAIRE CANADIENNE | 2017年 / 58卷 / 04期
关键词：
DAIRY HEIFERS; ARTIFICIAL-INSEMINATION; SORTED SPERM; FERTILITY; CATTLE; COWS;
D O I：
暂无
中图分类号：
S85 [动物医学（兽医学）];
学科分类号：
0906 ;
摘要：
This study compared pregnancy per AI (P/AI) of heifers inseminated with sex-selected or conventional semen after estrus detection (ED) or timed-AI (TAI). Heifers in the ED group received 2 treatments with prostaglandin F2 alpha 14 d apart and those in the TAI group received a modified 5-day Co-synch protocol plus an intravaginal progesterone releasing insert device (PRID) and were inseminated 72 h after PRID removal. Overall P/AI were 69.2% (74/107) and 64.1% (75/117) for conventional and sex-selected semen (P > 0.05). Although P/AI in ED heifers following the use of conventional semen were numerically higher (75.0% versus 63.6%), P/AI with sex-selected semen were almost identical (65.0% versus 63.2%) for ED and TAI heifers. Pregnancy losses from first pregnancy diagnosis to term did not differ between ED and TAI heifers (6.0% versus 11.3%). In summary, heifers subjected to TAI with sex-selected semen following the application of a modified 5-day Co-synch plus PRID protocol had acceptable P/AI.
引用
收藏
页码：365 / 370
页数：6
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