Earticle

초록

영어

Background: Hanwoo cattle farmers aim to improve calf production and reproductive efficiency. Recovery of the reproductive tract postpartum is a critical factor influencing the postpartum period and conception of breeding cows. This study aimed to precisely analyze the recovery process of the reproductive tract in primiparous Hanwoo postpartum and to establish recovery criteria. Methods: Ten primiparous Hanwoo cows were used in this study. After parturition, estrus was examined daily using visual observations and estrus detection patches. Ovarian recovery, cervical diameter, and uterine horn diameter were examined using ultrasonography four times per week. Results: The analysis revealed that the first estrus occurred at 19.1 ± 6.5 days postpartum, the first ovulation at 27.1 ± 4.5 days, and the first normal estrus cycle at 39.2 ± 6.4 days. The ovulation rate during the first estrus was 40%. A normal estrus cycle occurred in 11.1% of patients at the first ovulation. The cervix diameter recovered to 42.0 ± 3.5 mm and the uterine horn diameter to 34.4 ± 7.1 mm by 24 days postpartum, with the difference in uterine horn diameter recovering to 2.6 ± 1.2 mm by 31 days postpartum. Conclusions: This study can aid in determining the optimal breeding time for postpartum primiparous Hanwoo cow and provide foundational data for Hanwoo breeding studies.

목차

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
Animals and management
Estrus detection
Measurement of ovarian activity and uterine recovery
Blood sampling and measurement of serum hormones
Statistical analysis
RESULTS
DISCUSSION
CONCLUSION
REFERENCES

키워드

저자

• Yonghwan Kim [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration, Department of Animal Resources Science, Kongju National Universuty ]
• Myungsun Park [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Jeong Il Won [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Shil Jin [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Hyoun Ju Kim [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Eunju Kim [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Sung Woo Kim [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Sang-Rae Cho [ Animal Genetic Resources Research Center, National Institute Animal Science, Rural Development Administration ]
• Seunghoon Lee [ Animal Biotechnology Division, National Institute Animal Science, Rural Development Administration ]
• Youl-Chang Baek [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ]
• Bongki Kim [ Department of Animal Resources Science, Kongju National Universuty ]
• Sung-Sik Kang [ Hanwoo Research Institute, National Institute Animal Science, Rural Development Administration ] Corresponding Author

참고문헌

발행기관

간행물

관심저널 등록

• 간행물명

  Journal of Animal Reproduction and Biotechnology

• 간기

  계간

• pISSN

  2671-4639

• eISSN

  2671-4663

• 수록기간

  2019~2026

• 십진분류

  KDC 527 DDC 636