Evidence from a detailed investigation and review of the literature on monozygotic twins discordant for schizophrenia indicates that the schizophrenic index case was lighter in weight at birth than his co-twin (Stabenau and Pollin, 1967). Lane and Albee (1966) reported that schizophrenic singletons were significantly lighter in birth weight than their sibs.
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Woerner et al. (1971) studied this question.
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