Another nail in the coffins of those who fight to prevent this life saving intervention I would say. A study of the bone health of adolescents with gender identity disorder who received puberty suppression treatment with GnRHa (gonadotropin-releasing hormone analogs - a derivative of the physiologic hormones) has shown no long term deleterious effects on adolescents - once cross-hormone therapy has been commenced.

Read the full study report at:- http://www.eurekalert.org/pub_releases/2013-06/tes-mii061513.php