Assertion: estrogen's level | /r/HasProperty | 10 to 50 ng/ml
Facets:
value: in the first trimester
type: TEMPORAL
Source sentences:
text: Levels of progesterone are 10 to 50 ng/mL in the first trimester and rise to 50 to 280 ng/mL in the third trimester, with a mean of around 150 ng/mL at term.