| N91.0 |
Primary amenorrhoea
Failure to start menstruation at puberty.
|
| N91.1 |
Secondary amenorrhoea
Absence of menstruation in a woman who had previously menstruated.
|
| N91.2 |
Amenorrhoea, unspecified
Absence of menstruation NOS
|
| N91.3 |
Primary oligomenorrhoea
Menstruation which is scanty or rare from the start.
|
| N91.4 |
Secondary oligomenorrhoea
Scanty and rare menstruation in a woman with previously normal periods.
|
| N91.5 |
Oligomenorrhoea, unspecified
Hypomenorrhoea NOS
|