Is there an increase of reproductive rates in schizophrenics? III. An investigation in Nordbaden (SW Germany): results and discussion.

Two cohorts of schizophrenic patients admitted to a psychiatric hospital for the first time either during 1949-50 or 1965-67 were compared with matched controls for reproductive rates before and 13 years after onset of psychosis. Patients of both admission periods had reduced marriage rates. After onset of the disease the rate of reproduction was decreased in males of both periods, but not in females. Patients of both periods did not differ from control values with respect to marital fertility. It has repeatedly been reported that fertility of schizophrenics has been increasing in recent times. Comparison of total reproduction, rate of marriage and marital fertility in patients of the two admission periods and matched controls did not yield any evidence for increasing rates. Instead, the results favour the idea that the patients parallel at a lower level the general decline of birth rates observed in Western Germany.