My children were born in the UK, where we were given two formulae (one for boys, one for girls) for calculating our children’s growth potential based solely on the parents’ heights. It’s a little more complicated than the ones above. I blogged about it soon after my son was born: http://weblog.xanga.com/blissful_e/643364169/growth-potential.html
And a friend told me just two days ago about a height predictor for children aged 8 to 16 from the University of Saskatchewan: http://athena.usask.ca/growthutility/phv_ui.cfm?type=2

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