N91 — Absent, scanty and rare menstruation

Descendants
Code	Description
N910	Primary amenorrhoea
N911	Secondary amenorrhoea
N912	Amenorrhoea, unspecified
N913	Primary oligomenorrhoea
N914	Secondary oligomenorrhoea
N915	Oligomenorrhoea, unspecified

Heading of aggregated item CIM-10 (en) to which it belongs

N80-N98 Noninflammatory disorders of female genital tract