Le Matenda a Turner (Nthawi zina amatchedwa gonadal dysgenesis) ndi matenda amtundu zomwe zimangokhudza amayi. Zovuta zimakhudza imodzi mwa ma X chromosomes (ma chromosomes ogonana). Matenda a Turner amakhudza pafupifupi Amayi amodzi (1) mwa amayi khumi (2) aliwonse ndipo nthawi zambiri amapezeka zaka zingapo atabadwa, ali wachinyamata. Zizindikiro zazikulu ndizochepa msinkhu komanso kugwira ntchito modabwitsa kwa thumba losunga mazira. Matenda a Turner amatchulidwa ndi dokotala waku America yemwe adawapeza mu 1938, Henri Turner.

Amuna ali ndi ma chromosomes 46 kuphatikiza ma chromosomes awiri otchedwa XY. Mtundu wamwamuna wamwamuna ndi 46 XY. Amayi amakhalanso ndi ma chromosomes 46 kuphatikiza ma chromosomes awiri ogonana otchedwa 46 XX. Momwe mkazi amakhalira ndi 46 XX. Mwa amayi omwe ali ndi matenda a Turner, kuphatikiza kwa majini kumakhala ndi X chromosome imodzi, chifukwa chake chibadwa cha mayi yemwe ali ndi matenda a Turner ndi 45 X0. Amayi awa akusowa chromosome X kapena X chromosome ilipo, koma ali ndi vuto lomwe limatchedwa kufufutidwa. Chifukwa chake nthawi zonse pamakhala kusowa kwa chromosomal.