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Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep
INTRODUCTION: The ovarian follicular dynamics, vaginal electrical resistance (VER), progesterone (P(4)) and oestrogen (E(2)) 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 obs...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Sciendo
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6364172/ https://www.ncbi.nlm.nih.gov/pubmed/30729218 http://dx.doi.org/10.2478/jvetres-2018-0080 |
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author | Talukder, Mohammad Rafiqul Islam Hasan, Moinul Rosy, Tasmia Akter Bari, Farida Yeasmin Juyena, Nasrin Sultana |
author_facet | Talukder, Mohammad Rafiqul Islam Hasan, Moinul Rosy, Tasmia Akter Bari, Farida Yeasmin Juyena, Nasrin Sultana |
author_sort | Talukder, Mohammad Rafiqul Islam |
collection | PubMed |
description | INTRODUCTION: The ovarian follicular dynamics, vaginal electrical resistance (VER), progesterone (P(4)) and oestrogen (E(2)) 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(2) concentration and development of follicles and a negative correlation between P(4) 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. |
format | Online Article Text |
id | pubmed-6364172 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Sciendo |
record_format | MEDLINE/PubMed |
spelling | pubmed-63641722019-02-06 Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep Talukder, Mohammad Rafiqul Islam Hasan, Moinul Rosy, Tasmia Akter Bari, Farida Yeasmin Juyena, Nasrin Sultana J Vet Res Research Article INTRODUCTION: The ovarian follicular dynamics, vaginal electrical resistance (VER), progesterone (P(4)) and oestrogen (E(2)) 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(2) concentration and development of follicles and a negative correlation between P(4) 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. Sciendo 2018-12-31 /pmc/articles/PMC6364172/ /pubmed/30729218 http://dx.doi.org/10.2478/jvetres-2018-0080 Text en © 2018 M.R.I. Talukder et al. published by Sciendo http://creativecommons.org/licenses/by-nc-nd/3.0 This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. |
spellingShingle | Research Article Talukder, Mohammad Rafiqul Islam Hasan, Moinul Rosy, Tasmia Akter Bari, Farida Yeasmin Juyena, Nasrin Sultana Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title | Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title_full | Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title_fullStr | Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title_full_unstemmed | Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title_short | Monitoring Vaginal Electrical Resistance, Follicular Waves, and Hormonal Profile During Oestrous Cycle in the Transition Period in Bangladeshi Sheep |
title_sort | monitoring vaginal electrical resistance, follicular waves, and hormonal profile during oestrous cycle in the transition period in bangladeshi sheep |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6364172/ https://www.ncbi.nlm.nih.gov/pubmed/30729218 http://dx.doi.org/10.2478/jvetres-2018-0080 |
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