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KMID : 1005220100250030155
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Journal of Embryo Transfer
2010 Volume.25 No. 3 p.155 ~ p.159
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Factors Effecting on Artificial Insemination in Multi-Parturition Cattle
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Jeong Gyeong-Yong
Park Sung-Jae
Kim Nam-Hyung
Baek Kwang-Soo
Jeon Byeong-Soon
Lim Hyun-Joo
Hur Tai-Young
Ki Kwang-Seok
Lee Gyoung-Suk
Kang Sung-Yong
Lee Hyung-June
Chang Won-Kyong
Kim Hyeon-Shup
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Abstract
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The objective of this study was to determine physiological and mechanical factors effecting on the pregnancy rates following artificial insemination in dairy cattle. Estrus for artificial insemination of cows was checked whether the outflow of mucus from the elements was out flow or not. There were no significant difference of gestation rates with mucus release (31.76%) and without mucus release (24.03%). The pregnancy rates were 39.02% in 10~20mm of follicle size group and 27.08% (p<0.05) in 20~30mm diameter of the follicles. There were not different pregnancy rates between twice inseminated dairy cattle and more than 3 times inseminated cattle. The pregnancy rate was 28.57% under automatic milking system. In contrast, under artificial milking system pregnancy rate was 56.85%. Two systems significantly (p<0.05) were different. These results suggest that pregnancy rates were not effected by physiological system, but mechanical condition.
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KEYWORD
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dairy cattle, artificial insemination, pregnancy rates
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