
TY  - JOUR
A1  - Yoshioka, H. 
A1  - Matsuda, H. 
A1  - Sasaguri, K. 
A1  - Yonai, M. 
T1  - 21 RELATIONSHIP BETWEEN DURATION OF ESTRUS BEHAVIOR DETERMINED BY RADIOTELEMETORY SYSTEM AND THREE FACTORS (MILK PRODUCTION, STEROID HORMONE, AND OVULATION TIME) IN DAIRY COWS
JF  - Reproduction, Fertility and Development
JO  - Reprod. Fertil. Dev.
Y1  - 2006
VL  - 19
IS  - 1
SP  - 129
EP  - 129
KW  - 
UR  - https://doi.org/10.1071/RDV19N1AB21 
N2  - Many studies have reported on the low fertility of dairy herds during the past several years. The object of this study was to investigate the relationships between duration of estrus and various factors (milk production, peripheral steroid hormones, and period from estrus to ovulation). All primiparous and multiparous Holstein cows (n = 62) were fitted pedometers (Gyuho; Comtec, Miyazaki, Japan) that measure total counts of walking activity per hour and send the individual cow 
ER  -

