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孟加拉国绵羊过渡期发情周期中阴道电阻、卵泡波和激素水平的监测

Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep.

作者信息

Talukder Mohammad Rafiqul Islam, Hasan Moinul, Rosy Tasmia Akter, Bari Farida Yeasmin, Juyena Nasrin Sultana

机构信息

Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

出版信息

J Vet Res. 2018 Dec 31;62(4):571-579. doi: 10.2478/jvetres-2018-0080. eCollection 2018 Dec.

DOI:10.2478/jvetres-2018-0080
PMID:30729218
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6364172/
Abstract

INTRODUCTION

The ovarian follicular dynamics, vaginal electrical resistance (VER), progesterone (P) and oestrogen (E) profiles were investigated during the oestrous cycle in four indigenous ewes.

MATERIAL AND METHODS

Daily VER values were recorded with a heat detector. The follicles were observed and measured by trans-rectal ultrasonography. Blood was collected daily for hormonal profiles.

RESULTS

A significant variation in VER values (P < 0.05) in oestrus by ewes and position in the sequence of cycles was observed. Trans-rectal ultrasonography of ovaries revealed the presence of 2-4 waves of follicular growth. Study of hormonal profiles by ELISA revealed a positive correlation between E concentration and development of follicles and a negative correlation between P concentration and their development. The concentrations of oestradiol increased in oestrus and then decreased to a basal level. Follicular growth was accompanied by a rise in the concentration of serum oestradiol. Inversely, when follicles received the stimulation for ovulation, concentration of progesterone started to fall, but after ovulation, it climbed back to its peak and remained at this state until next ovulatory follicle reached its maximum diameter.

CONCLUSION

This study could help to set up a manipulative reproductive technique for improving genetic values in indigenous sheep.

摘要

引言

对4只本地母羊发情周期中的卵泡动态、阴道电阻（VER）、孕酮（P）和雌激素（E）情况进行了研究。

材料与方法

用热探测器记录每日VER值。通过经直肠超声观察和测量卵泡。每天采集血液用于激素情况分析。

结果

观察到母羊发情时VER值有显著变化（P < 0.05），且在周期顺序中的位置也有变化。经直肠卵巢超声检查发现有2 - 4个卵泡生长波。通过酶联免疫吸附测定法（ELISA）对激素情况的研究显示，E浓度与卵泡发育呈正相关，P浓度与卵泡发育呈负相关。发情期雌二醇浓度升高，然后降至基础水平。卵泡生长伴随着血清雌二醇浓度升高。相反，当卵泡受到排卵刺激时，孕酮浓度开始下降，但排卵后，它又回升至峰值并保持该状态，直到下一个排卵卵泡达到最大直径。

结论

本研究有助于建立一种用于提高本地绵羊遗传价值的人工繁殖技术。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bb36/6364172/71618a0e22de/jvetres-62-571-g007.jpg
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