原始生殖细胞
primordial germ cells
primordial germ cell
Embryonic primordial germ cells
primordial germ cell PGC
artificial purple dolomite
potential germ cells
primoridial germ cells
genital ridge
aecheocyte
archaeocyte
archeocyte
PGCs
archecyte
embryonic stem cell
性细胞形成
the formation of sexual cell