Survival of Nieces and Nephews of Schizophrenic Patients

Abstract

Summary: Evidence was found against the hypothesis that heterozygous carriers of a schizophrenic gene have a reproductive advantage through enhanced fertility. In consequence an investigation was made of the possibility that an advantage is gained through diminished early mortality among the offspring of carriers. The results were equivocal. While an observed deficit of infant deaths was attributable to under-reporting, the possibility of a true advantage could not be ruled out, because of the statistical unreliability of the findings in a sample of the size available. A plea is made for a collaborative effort to settle the issue.