Rb. Perkins et al., Aetiology, previous menstrual function and patterns of neuro-endocrine disturbance as prognostic indicators in hypothalamic amenorrhoea, HUM REPR, 16(10), 2001, pp. 2198-2205
BACKGROUND: Hypothalamic amenorrhoea (HA) is a syndrome associated with inf
ertility and osteopenia in reproductive-age women. METHODS: To understand b
etter the natural history of this disorder, 28 women participated in a retr
ospective, questionnaire-based analysis to elucidate factors associated wit
h spontaneous recovery. RESULTS: 54% of subjects developed HA related to an
eating disorder, 21% related to stress +/- weight loss, and 25% without ob
vious contributing factors (idiopathic). HA associated with a clear precipi
tant had a better prognosis than idiopathic HA (71 versus 29% recovery; P <
0.05). Reversal of the inciting factor appeared necessary but not sufficie
nt for recovery (83% recovery if factor reversed). Normal menarche occurred
in 61% of subjects, oligomenorrhoea in 32%, and primary amenorrhoea in 7%.
Oligomenorrhoea and normal menarche showed a trend toward better prognosis
than primary amenorrhoea (NS). Compared with controls, 46% of HA patients
had decreased frequency of LH pulses, 7% decreased amplitude, 18% decreases
in both frequency and amplitude, 18% absent pulses, and 11% normal-appeari
ng pulses. Pulse pattern at baseline did not predict recovery. CONCLUSIONS:
The aetiology of HA at the time of presentation predicts subsequent recove
ry of menstrual function. In stress, weight loss, or eating disorder-relate
d HA, rates of recovery exceeded 80% when precipitating factors were revers
ed. Idiopathic HA may represent a different disorder as recovery rates were
< 30%.