Assertion: adrenal gland's secretion | /r/ObjectUse | used by the placenta
Facets:
value: as estrogen precursors
type: MANNER
Source sentences:
text: Fetal zone (FZ) - expressing the P450C17 cytochrome, is responsible for massive secretion of DHEA and DHEA/S, used by the placenta as estrogen precursors.