Assertion: amenorrhea's birth defect | /r/Causes | lack of periods
Facets:
Source sentences:
text: A birth defect such as an underdeveloped or absent uterus (the organ where menstrual blood comes from) can cause lack of periods.
text: A birth defect such as an underdeveloped or absent uterus (the organ where menstrual blood comes from) can cause lack of periods.