Assertion: testis's germ cell | /r/HasProperty | replaced by adult dark
Facets:
value: postnatally in humans
type: TEMPORAL
value: at 2 months of age
type: TEMPORAL
Source sentences:
text: Postnatally in humans, at 2 months of age, primordial germ cells (gonocytes) are replaced by adult dark (Ad) and pale (Ap) spermatogonia that make up the spermatogonial stem cell (SSC) population that at puberty will commence differentiation into spermatozoa.