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March 1971, Vol 121, No. 3 >
Article | March 1971

Enuresis in Twins

Harry Bakwin, MD
Am J Dis Child. 1971;121(3):222-225. doi:10.1001/archpedi.1971.02100140088007.
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Comparison of the incidence of enuresis in monozygotic and same-sex dizygotic twins revealed that bed-wetting after the fourth birthday was present in 146 out of 676 twin children, an incidence of 22%. Monozygotic twins are concordant for enuresis about twice as frequently as dizygotic twins, a statistically significant difference. This finding together with the family studies is consistent with the view that the basis for enuresis is principally genetic. The incidence of nail-biting in children with enuresis is about the same as in the non-enuretic. Finger-sucking after 3 years of age is more frequent in children with enuresis. No relation was found between the incidence of enuresis and the ABO blood types.

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