| 摘要: |
| 应用 RIA 测定了3头尼里水牛和4头滨湖水牛分娩期和产后期血浆孕酮和17β—雌二醇的水平。胎儿排出前,胎儿排出期和胎衣排出后的孕酮和17β—雌二醇的平均水平分别为27.8、35.9、30.4pg/ml 和86.0、53.1、26.3pg/ml。产后期孕酮和17β—雌二醇水平均持续较低,前者变动范围是50.7—656.2pg/ml,平均166.6±46.1pg/ml,后者的变动范围是1.2—28.9pg/ml,平均8.4±0.9pg/ml,且没有发情表现。18号牛的孕酮值在产后第50天陡然下降(35.5pg/ml),17β—雌二醇水平却急剧上升(10.4pg/ml),并具有发情表现。由此证明,孕酮水平的变化是影响产后发情的主要内分泌因素。 |
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| Changes in Plasma Progesterone and 17β-estradiol Levels of Buffaloes during Parturition and after Calving |
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| Abstract: |
| The plasma levels of progesterone(P),17β-estradiol(17β-E2)were measured by RIA in three Nili-Ravi buffaloes and four Binhu buffaloes during parturition and after calving.The average levels of P were 27.8,35.9 and 30.4 pg/ml, and 86.0,53.1 and 26.3 pg/ml for 17β-E2 average levels before delivery of the fetus during delivery of the fetus and after expulsion of fetal memBrane respectively.The levels of P and 17β-E2 were lower in postpartum,and were in the range of 50.7 to 656.2 pg/ml and 1.2 to 28.9 pg/ml respectively,and estrus was not observed.P levels declined precipitously and 17β-E2 values increased gradually for No. 18 buffaloesn the soth doy of postpartum,and estrus was observed.The result indicated that the change of P level was a main factor influencing postpartum estrus of buffaloes. |
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