Abstract
71 twin pairs, aged 8–12 yrs, have been investigated. Zygosity has been determined by eight blood group systems. 25 pairs/14 female, 11 male/were monozygous, 19 pairs/ 10 female, 9 male/were like-sexed dizygous, 27 pairs unlike-sexed. Bone age was measured by the Tanner-Whitehouse method. Twins as a group are not retarded in skeletal maturation at this age, although 34 % were born prematurely. Mean difference/ intrapair/ in bone age was 0.096 ± 0.073 /SD/, 0.918 ± 0.616 andl. 149 ± 0.581yrs for the 3 groups respectively. P<;0.001 for MZ/DZ, P˜0.5 for DZ like-sexed/ unlike-sexed. Within-pair correlation coefficiens are 0.996 /MZ/, 0.735 /DZLS/ and 0.517/DZUS/. Bone maturation at this age is determined largely by genetic factors.
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Cholnoky, P., Gagyi, D. & álmos, S. BONE AGE IN TWINS. Pediatr Res 9, 863 (1975). https://doi.org/10.1203/00006450-197511000-00066
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DOI: https://doi.org/10.1203/00006450-197511000-00066
