Assertion: amniocentesis | /r/HasProperty | performed before 14 weeks
Facets:
value: in the past
type: TEMPORAL
Source sentences:
text: Amniocentesis is always done after 15 weeks (when there is plenty of amniotic fluid present) to prevent a high percentage of “failed results” and club foot problems that have been seen when amniocentesis was performed before 14 weeks in the past.