Estrone Sulfate Concentrations, Calf Birth Weight and Viability, and Placental Weight and Expulsion in Dairy Cattle with Different Gestation Length

この論文にアクセスする

この論文をさがす

著者

抄録

Fifty-four pregnant Holstein-Friesian cattle were divided into 3 groups according to their gestation length (A=274-280 days; B=281-285; C=286-290). Changes in plasma estrone sulfate (E1S) concentrations during pregnancy, calf birth weight, calf viability, placental weight and placental expulsion were compared among the 3 groups. Differences in E1S concentrations among these groups became evident after day 271 of pregnancy and E1S levels in groups A and C were lower than in group B. In male calves, birth weights in group A were significantly lower than those in groups B (P<0.01) and C (P<0.05). Likewise, in female calves, birth weights in group A were significantly lower than those in group C (P<0.05). There were no significant differences in birth weights of both male and female calves between groups B and C. Incidences of weak calves and retained placenta were lower in group B (11.5%) than in groups A (25.0%) and C (43.8%). Cotyledonary weights in group B tended to be higher than in groups A and C, and there were significant differences between groups A and B for dams with male neonates and for total dams, and between groups B and C for total dams. Thus, gestation length below the herd average is associated with low calf birth weight, low cotyledonary weight and low plasma E1S concentrations, while gestation length above the herd average is not necessarily associated with high calf birth weight, high cotyledonary weight or high plasma E1S concentrations. The longer gestation period, however, resulted in higher incidence of neonatal weakness and retained placenta. These results indicate that the feto-placental growth slows or ceases when a gestation period extends over a normal period and as a consequence prevalence of retained placenta and weak calves increases in cows with longer gestation period.

収録刊行物

  • 日本畜産學會報 = The Japanese journal of zootechnical science  

    日本畜産學會報 = The Japanese journal of zootechnical science 70(6), 429-436, 1999-11-25 

    Japanese Society of Animal Science

参考文献:  33件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  2件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10021722899
  • NII書誌ID(NCID)
    AN00195188
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    1346907X
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
ページトップへ