Growth response in Turner syndrome with recombinant human growth hormone therapy.

Ten Turner syndrome girls whose mean age was 10.9 +/- 2.7 years were treated with recombinant human growth hormone (rhGH), dose 0.6 U/kg/week. Five of them had classical 45, XO karyotype. The mean height velocity increased from 2.8 +/- 1.3 cm/year before treatment to 6.1 +/- 2.06 cm/year after treatment for a period of 1.4 years. The response of treatment correlated well with pretreatment height velocity (<3 cm/year) but not with karyotype. However, the response has been decreasing and an increased dose after the first year of treatment is recommended.