Survey on fertility of retained placenta and abomasal displacement cows after single or twin births in dairy cows in Korea
2012
Cho, J.H., Chungnam National University, Daejeon, Republic of Korea | Kim, M.C., Chungnam National University, Daejeon, Republic of Korea | Jeong, S.M., Chungnam National University, Daejeon, Republic of Korea | Lee, J.Y., Chungnam National University, Daejeon, Republic of Korea | Shin, B.J., Chungnam National University, Daejeon, Republic of Korea
Calving records of Holstein dairy cows from 2005 to 2010 comprising Goyang and Paju cities herd with 2,362 calving events representing 240 twin births were used to evaluate the effect of abomasal displacement and retained placenta after single or twin births on fertility. In retained placenta cows, the period of twin pregnancy (mean 270.5 days) was shorter than that of single pregnancy (mean 274.8 days), however first artificial insemination period (twin: mean 107.4 days, single: mean 92.0 days), non-pregnant period (twin: 154.8 days, single: 132.2 days), and number of insemination (twin: mean 2.00 times, single: mean 1.87 times) of twin pregnancy were increased as compared with single pregnancy. In abomasal displacement cows, first artificial insemination period (twin: mean 122.9 days, single: mean 106.0 days), non-pregnant period (twin: 172.4 days, single: 152.0 days), and number of insemination (twin: mean 2.16 times, single: mean 1.89 times) of twin pregnancy were increased as compared with single pregnancy. The prevalence of complication such as retained placenta, abomasal displacement with single or twin births increased first artificial insemination period, non-pregnant period, and number of insemination period.
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