N91 "Absent, scanty and rare menstruation" ( Search )
- N910 Primary amenorrhoea ( Search )
- N911 Secondary amenorrhoea ( Search )
- N912 "Amenorrhoea, unspecified" ( Search )
- N913 Primary oligomenorrhoea ( Search )
- N914 Secondary oligomenorrhoea ( Search )
- N915 "Oligomenorrhoea, unspecified" ( Search )
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