Assertion: birth control's progesterone | /r/HasProperty | hormone
Facets:
Source sentences:
text: Pincus and John Rock, an obstetrician, began working in secret to figure out if it was possible to use progesterone, a hormone produced by the body during pregnancy, to prevent pregnancy in women.
text: Progesterone, another hormone in birth control pills, can also cause nausea.
text: This drug, taken during the first trimester of pregnancy, inhibits the effects of progesterone, a hormone that is essential to the continuation of the pregnancy.