第一节妊娠识别与胚泡附植 Section 1 Maternal recognition and implantation 、妊娠识别和建立 Maternal recognition and establishment of pregnancy 二、胚泡的附植 Implantation of blastocyst第一节 妊娠识别与胚泡附植 Section 1 Maternal recognition and implantation 一、妊娠识别和建立 Maternal recognition and establishment of pregnancy 二、胚泡的附植 Implantation of blastocyst