Effect of body condition score and reuse of progesterone-releasing intravaginal devices on conception rate following timed artificial insemination in Nelore cows

被引：11

作者：

Pereira, L. L. ^{[1
]}

Ferreira, A. P. ^{[1
]}

Vale, W. G. ^{[1
]}

Serique, L. R. ^{[1
]}

Neves, K. A. L. ^{[1
]}

Morini, A. C. ^{[1
]}

Monteiro, B. M. ^{[2
]}

Minervino, A. H. H. ^{[1
]}

机构：

[1] Univ Fed Oeste Para UFOPA, Inst Biodiversidade & Florestas, Santarem, Para, Brazil

[2] Univ Sao Paulo, FMVZ, Sao Paulo, Brazil

来源：

REPRODUCTION IN DOMESTIC ANIMALS | 2018年 / 53卷 / 03期

关键词：

body condition score; conception rate; fixed time artificial insemination; progesterone-releasing intravaginal device; synchronization; REPRODUCTIVE-PERFORMANCE; BEEF-CATTLE; ESTRADIOL; SYNCHRONIZATION; FERTILITY; OVULATION; DAIRY;

D O I：

10.1111/rda.13150

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Contents This study had the aim of investigating the efficiency of timed artificial insemination (TAI) through the progesterone-releasing intravaginal device (PRID), used in new condition and for the second and third times in Nelore cows. The effects of device reuse and body condition score (BCS) on the conception rate (CR) were evaluated in 1,122 multiparous Nelore cows (mean BCS of 2.7 +/- 0.4), which were randomly distributed into three groups that received new (n=330), once (n=439) and twice used (n=353) PRID. Among the 1,122 females that underwent TAI, 573 became pregnant, thus representing an overall CR of 51.06%. Cows with BCS between 2.75 and 4.0 had greater (p<.0001) CR (69.75%) than cows with BSC of 2.0-2.5 (32.98%). It was observed that the CR through using PRID was 60.00%, 51.71% and 41.93% for new, once and twice used PRID, respectively, with difference between all groups (p<.0001). Under tropical conditions, animals with BCS greater than 2.5 had a higher CR, and the CR decreased proportionally with the number of times that the PRID had been used.

引用

页码：624 / 628

页数：5

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