Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.
KMID : 0359319940340010189
Korean Journal of Veterinary Research
1994 Volume.34 No. 1 p.189 ~ p.193
Progesterone assays as an aid for improving reproductive efficiency in dairy cattle





Abstract
This study was undertaken to clarify the relationship between the cause of repeat-breeder and the luteal dysfunction in repeat-breeder dairy cows that failed to conceive to three or more artificial insemination(AI) at a regular interval. Progesterone concentrations were measured in milk fat for 20 to 22 days after AI.
From the 15 repeat-breeder dairy cows, six cows had a normal progesterone profiles. Five cows showed a delayed rise of the progesterone concentrations until 7 to 10 days after AI, two cows had a comparatively low concentration of milk progesterone below 150 ng/§¢ through most of the luteal phase, and two cows had a combined pattern of a delayed rise and a low concentration of¢¥ milk progesterone during luteal phase.
It is suggest that luteal dysfunction as indicated by progesterone profiles is one of the causes of repeat-breeder in dairy cows.
KEYWORD
FullTexts / Linksout information
Listed journal information
ÇмúÁøÈïÀç´Ü(KCI)