GH1 and Turner syndrome: Validated models for predicting individual growth responses to growth hormone (GH) treatment have been constructed for short children born appropriate for gestational age (AGA) who have a broad range of GH secretory status [1], for children with GH deficiency (GHD) [2,3], for children born small-for-gestational age (SGA) without severe GHD [4], and for girls with Turner syndrome [5].