Relationship between plasma progesterone and pregnancy-associated glycoprotein concentrations during early pregnancy in dairy cows

被引：7
作者：
Barbato, Olimpia [1 ]
Merlo, Mariacristina [2 ]
Celi, Pietro [3 ]
Sousa, Noelita M. [4 ]
Guarneri, Luigi [5 ]
Beckers, Jean F. [4 ]
Gabai, Gianfranco [2 ]
机构：
[1] Univ Perugia, Fac Vet Med, Dept Biopathol Vet Sci, I-06126 Perugia, Italy
[2] Univ Padua, Dept Comparat Biomed & Food Sci, I-35020 Legnaro, PD, Italy
[3] Univ Sydney, Fac Vet Sci, Narellan, NSW 2567, Australia
[4] Univ Liege, Fac Vet Med, B-4000 Liege, Belgium
[5] Studio Vet Associato EMBRYOVET, I-25028 Brescia, Italy
来源：
VETERINARY JOURNAL | 2013年 / 195卷 / 03期
关键词：
Dairy cattle; Early pregnancy; Progesterone; Pregnancy associated glycoprotein; Late embryonic mortality; CATTLE; MORTALITY;
D O I：
10.1016/j.tvjl.2012.06.028
中图分类号：
S85 [动物医学（兽医学）];
学科分类号：
0906 ;
摘要：
The relationship between the concentration of plasma progesterone (P4) during embryo attachment or at recognition of pregnancy, and that of pregnancy-associated glycoprotein (PAG) was assessed in dairy cows. The outcome of artificial insemination (AI) was classified as positive (AI+), negative (AI-), or late embryonic mortality (EM) by measuring circulating PAG concentrations and by ultrasonography. Based on P4 concentrations at either day 21 or day 15, AI+ and EM cows were classified into 'low' (P4 concentrations < mean) and 'high' (P4 concentrations > mean) P4 groups. In both experiments, the threshold of P4 concentration between the 'low' and 'high' groups was approximately 6 ng/mL. PAG concentrations were lower in the 'low' group only when P4 concentrations were below the threshold. The study findings suggest that a possible P4 threshold exists below which PAG secretion may be impaired. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：385 / 387
页数：3
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