Objective: Set up a method of isolation and purification of early pregnancy factor (EPF) from human pregnancy sera, and get pure EPF.

目的：建立一条从妊娠早期妇女血清中分离纯化早孕因子的技术路线，获得高纯度的早孕因子。

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Object: Set up a method of isolation and purification of early pregnancy factor (EPF) from human pregnancy sera and get pure EPF, then attempt to prepare monoclonal antibodies.

目的：建立一条从孕早期妇女血清中分离纯化早孕因子(EPF)的技术路线，获得高纯度的EPF，并对制备抗epf单克隆抗体进行阶段性的初步尝试。

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