Femur lengthening and actual height gain

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Hi,

Sorry if the topic has already been adressed somewhere (but I didn't find it) :
I just would like to know in order to fix my goal, if the amount of femur lengthening corresponds to the actual height gain.
Indeed, it seems that due to the fact that the femur is naturally curved, the actual height gain could be  1cm less than the lengthening (at least it seems to be the case for helloworld according to his diary).
Is it the same case for others ?

Thanks

Edit Post

OK, in the meantime, I received the answer of my doc : apparently for each cm lengthens, the actual height gain is 0,97cm so for 8cm so the actual height gain will be 7,75cm in average.

It seems to be really small amount so difficile to notice/mesure but still, it would be interesting to heard from previous patients if it was the case for them