Assertion: primary amenorrhoea | /r/DefinedAs | the absence of menstruation
Facets:
value: by age
type: OTHER
Source sentences:
text: For the purpose of this study menstrual dysfunction included a history of secondary amenorrhoea (defined as the absence of three or more consecutive menstrual periods at any time since menarche) and/or primary amenorrhoea (defined as the absence of menstruation by age 15).