TABLE 5. Characteristics of 85 patients with POF observed (1982-92) at the Endocrinology Dpt. University of Catania Medical School.
| No. of patients | % | Primary amenorrhea | Secondary amenorrhea | Oligomenorrhea | |
| Chromosomal abnormalities | 16 | 18.9 | 11 | 5 | - |
| Pure gonadal dysgenesis | 1 | 1.1 | - | 1 | - |
| Ovariectomy | 11 | 13.5 | - | 11 | - |
| Radiotherapy | 2 | 2.4 | - | 2 | - |
| Savage syndrome | 1 | 1.1 | - | 1 | - |
| Werner syndrome | 1 | 1.1 | - | 1 | - |
| Autoimmune disorder | 5 | 6.0 | - | 5 | - |
| Viral disease | 1 | 1.1 | - | 1 | - |
| Idiopathic | 47 | 55.3 | - | 33 | 14 |