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Original Article

Natural vs synchronized estrus : determinants of successful pregnancy in ewes using frozen-thawed Suffolk semen

첫 페이지 보기
  • 발행기관
    한국동물생명공학회(구 한국동물번식학회) 바로가기
  • 간행물
    Journal of Animal Reproduction and Biotechnology 바로가기
  • 통권
    Volume. 35 No. 2 (2020.06)바로가기
  • 페이지
    pp.183-189
  • 저자
    Md. Mahbubur Rahman, Nazmun Naher, Md. Mofijul Isam, Moinul Hasan, Farhana Naznin, Mohammad Musharraf Uddin Bhuiyan, Farida Yeasmin Bari, Nasrin Sultana Juyena
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A378904

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원문정보

초록

영어
The pregnancy rate in indigenous ewes inseminated with frozen-thawed Suffolk semen following natural and synchronized estrus was determined. The serum Progesterone and Estrogen concentration and vaginal electrical resistance (VER) of ewes at the time of Artificial Insemination (AI) were observed as successful pregnancy determinants. 21 healthy ewes were selected for this experiment during January-April, 2017. 10 ewes were inseminated in natural estrus. Whereas, 11 ewes were inseminated after estrus synchronization using intravaginal sponges containing 60 mg medroxyprogesterone acetate. Trans-cervical Al (TCAI) was performed in all ewes within 12-16 hours of observed heat. Prostaglandin E1 analogue impregnated vaginal sponge was used for cervical relaxation 6-8 hours before insemination. Pregnancy was diagnosed through trans-abdominal ultrasonography after 40 days of AI. The pregnancy rate of ewes in synchronized estrus was higher (54.5%) than in natural estrus (30%). Higher serum Progesterone level (0.90 ± 0.02 ng/mL) and significantly (p < 0.001) lower VER (257.78 ± 10.11 ohm) were observed at the time of AI in ewes becoming pregnant. Results suggest that higher Progesterone concentration and lower VER could be considered as pregnancy indicators. Oestrous synchronization could be implemented to increase the pregnancy rate in ewes.

목차

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
Ethical approval
Experiment location
Selection and management of ewes
Estrus synchronization
Heat detection
Determination of vaginal electrical resistance (VER)
Process of AI
Pregnancy diagnosis
Measurement of serum progesterone and estradiol concentration
Statistical analysis
RESULTS
Pregnancy rates in ewes
Changes in progesterone and estrogen concentration
Changes in vaginal electrical resistance (VER) values
Correlation among progesterone, estrogen, and VER values of pregnant and non-pregnant ewes
DISCUSSION
CONCLUSIONS
CONFLICTS OF INTEREST
ACKNOWLEDGEMENTS
AUTHOR CONTRIBUTIONS
AUTHOR’S POSITION AND ORCID NO.
REFERENCES

키워드

estrus pregnancy rate progesterone vaginal electrical resistance (VER)

저자

  • Md. Mahbubur Rahman [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Nazmun Naher [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Md. Mofijul Isam [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Moinul Hasan [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Farhana Naznin [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Mohammad Musharraf Uddin Bhuiyan [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Farida Yeasmin Bari [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ]
  • Nasrin Sultana Juyena [ Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh ] Corresponding Author

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    한국동물생명공학회(구 한국동물번식학회) [The Korean Society of Animal Reproduction and Biotechnology]
  • 설립연도
    1976
  • 분야
    농수해양>축산학
  • 소개
    동물번식생리학, 동물생명공학, 수의학, 인공수정 및 수정란이식을 이용한 동물개량에 관한 이론과 기술의 발전을 통해 학계, 연구계, 산업계 및 양축가 상호간의 협력을 도모함으로써 동물과학발전 및 사회일반의 이익에 기여 한다는 목적을 위해 노력해 나가겠습니다.

간행물

  • 간행물명
    Journal of Animal Reproduction and Biotechnology
  • 간기
    계간
  • pISSN
    2671-4639
  • eISSN
    2671-4663
  • 수록기간
    2019~2025
  • 십진분류
    KDC 527 DDC 636

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