Assertion: testis's germ cell | /r/AtLocation | the stage of transition
Facets:
value: to changing to prospermatogonia
type: PURPOSE
value: from early pgc
type: TEMPORAL
Source sentences:
text: The above results indicate that germ cells of week 12 to 19 are in the stage of transition from early PGC to late PGC further changing to prospermatogonia.