Placental growth factor, a protein The main source of PGF during pregnancy is the placental trophoblast. PGF is also expressed in many other tissues, including the villous trophoblast. 3d rendering
Stock Illustration - Placental growth factor, a protein the main source of pgf during pregnancy is the placental trophoblast. pgf is also expressed in many other tissues, including the villous trophoblast. 3d rendering. Clip Art gg91719740
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