Objective To analyze the heritabilities of physical growth items anditsr elated factors.
Methods 9 development items of 218 twin pairs aged 6 to 13 were investigated.The heritabilities were estimatded using intraclass correlation coefficient from the adjusted data for age.
Results Most of the estimated her itabilities of these items were above 60%, and with sex difference to some extent.
Conclusion Child development is mainly determined by the genetic factors.The effect of gender on her itabilities is more obvious for weight, head length and head breadth than other items.
DownLoad: