Oestrogen protection hypothesis of schizophrenia

EvidenceOutcomesFindings
Epidemiological studiesIncidence of schizophrenia in women and men

Peak of incidence earlier in men than women [3, 4]

Second peak of incidence in women at menopause [19]

Clinical studiesHormonal status and psychopathological symptomsLow levels of oestrogens associated with more severe psychotic symptoms [5, 19, 20]
Hormonal status and cognitive symptomsMenstrual cycle irregularity associated with cognitive impairment [24]
Clinical trialsAdministration of exogenous oestrogensPositive effects of oestrogens on clinical symptoms [5]