FACTORS INFLUENCING FERTILITY IN LAPAROSCOPIC ARTIFICIAL INSEMINATION IN SHEEP.

Q4 Veterinary

Archives of Veterinary Science Pub Date : 2022-03-31 DOI:10.5380/avs.v1i1.74955

T. G. Bergstein-Galan, R. Weiss, C. E. Camargo, L. Kozicki

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引用次数: 0

Abstract

Fertility following artificial insemination (AI) programs in sheep is affected by many variables. The aim of this study was to identify extrinsic (year, season), intrinsic (age and breed) and AI procedure related (number of AIs, synchronization protocols, semen preservation method) factors that influence fertility after laparoscopic AI in sheep. Data from 159 laparoscopic AI procedures were categorized according to year (from 2013 to 2017), season (Winter, Spring, Summer and Autumn), breed (Dorper, White Dorper, Texel, Cross-breed), age in months (≤12, 13-24, 25-36, 37-48, ≥49), estrus synchronization protocol (short-term or long-term), cumulative number of AIs (1 to 4) and semen preservation method (frozen or fresh). Frequency analysis using chi-square test was used. Year, age, number of AIs and synchronization protocols did not influence fertility after laparoscopic AI in sheep. Fertility was higher (P<0.05) in sheep inseminated in spring (64.28%) and summer (54.16%) when compared to winter (36.92%) and autumn (32.14%). Dorper breed fertility (58.02%) was higher (P<0.05) than White dorper (25%) and Cross-breed (30.23%). There was a lower (P<0.05) pregnancy rate in sheep inseminated with frozen semen (38.27%) than sheep inseminated with fresh semen (53.84%). In conclusion, season, breed and semen preservation method can influence fertility in sheep after laparoscopic AI.

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绵羊腹腔镜人工授精中影响生育能力的因素。

绵羊人工授精(AI)后的生育力受到许多变量的影响。本研究的目的是确定影响绵羊腹腔镜人工智能后生育能力的外在因素(年份、季节)、内在因素(年龄和品种)和人工智能程序相关因素(人工智能数量、同步方案、精液保存方法)。159例腹腔镜人工智能手术数据按年份(2013 - 2017年)、季节(冬、春、夏、秋)、品种(杜珀、白杜珀、Texel、杂交)、月龄(≤12、13-24、25-36、37-48、≥49)、发情同步方案(短期或长期)、人工智能累计数量(1 -4)和精液保存方法(冷冻或新鲜)进行分类。采用卡方检验进行频率分析。绵羊腹腔镜人工智能术后，年龄、人工智能数量和同步方案对其生育能力没有影响。春季和夏季受精率分别为64.28%和54.16%，高于冬季(36.92%)和秋季(32.14%)。杜珀品种的育肥率为58.02% (P<0.05)，高于白杜珀(25%)和杂交杜珀(30.23%)。冷冻精液受孕率(38.27%)低于新鲜精液受孕率(53.84%)(P<0.05)。综上所述，季节、品种和精液保存方式对腹腔镜人工授精后绵羊的生育能力有影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archives of Veterinary Science Veterinary-Veterinary (all)

CiteScore

0.30

自引率

0.00%

发文量

审稿时长

90 weeks

期刊介绍： O periódico ARCHIVES OF VETERINARY SCIENCE (AVS) é publicado trimestralmente, sob orientação do seu Corpo Editorial, com a finalidade de divulgar artigos completos e de revisão relacionados à ciência animal sobre os temas: clínica, cirurgia e patologia veterinária; sanidade animal e medicina veterinária preventiva; nutrição e alimentação animal; sistemas de produção animal e meio ambiente; reprodução e melhoramento genético animal; tecnologia de alimentos; economia e sociologia rural e métodos de investigação científica. A publicação dos artigos científicos dependerá da observância das normas editoriais e dos pareceres dos consultores “ad hoc”.