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妊娠中胎盘的形成最为独特。胎盘组织所分泌的与血管新生和滋养叶细胞功能相关的生长因子在胎盘形成和发育中起到重要作用。胎盘生长因子(placenta growth factor,PIGF)
The formation of placenta during pregnancy is the most unique. The growth factors secreted by placental tissue that are associated with angiogenic and trophoblastic cell functions play an important role in placental formation and development. Placenta growth factor (PIGF)