Primordial germ cells (PGCs), the precursors of the gametes, are now claimed to segregate within the extra-embryonic tissues of three species of placental mammals. In this brief Commentary, I raise the question of whether the so-called PGCs are not PGCs at all, but rather, progenitor cells that build the fetal-placental interface in Placentalia.
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| http://dx.doi.org/10.1016/j.rbmo.2017.09.013 | DOI Listing |
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