Le Turner syndrome (ka linako tse ling e bitsoa lefu la gonadal dysgenesis) Ke lefu la lefutso e amang basadi feela. Ntho e sa tloaelehang e ama e 'ngoe ea li-chromosome tsa X (li-chromosome tsa thobalano). Turner syndrome e ama hoo e ka bang Mosadi a le 1 mo go ba le 2 'me hangata e fumanoa lilemo tse 'maloa ka mor'a tsoalo, nakong ea bocha. Matšoao a maholo ke boemo bo bokhutšoanyane le ho sebetsa ho sa tloaelehang ha mae a bomme. Turner syndrome e rehelletsoe ka ngaka ea Amerika e ileng ea e fumana ka 1938, Henri Turner.

Banna ba na le li-chromosome tse 46 ho kenyelletsa le tse peli tseo ho thoeng ke li-chromosome tsa thobalano tse bitsoang XY. Foromo ea lefutso bakeng sa monna ke 46 XY. Basali ba boetse ba na le li-chromosome tse 46 ho kenyelletsa le li-chromosome tse peli tsa bong tse bitsoang 46 XX. Ka hona, liphatsa tsa lefutso tsa mosali ke 46 XX. Ho basali ba nang le lefu la Turner, motsoako oa liphatsa tsa lefutso o na le X chromosome e le 'ngoe, kahoo liphatsa tsa lefutso tsa mosali ea nang le lefu la Turner ke 45 X0. Ekaba basali bana ha ba na X chromosome kapa X chromosome e teng, empa ba na le ntho e sa tloaelehang e bitsoang ho hlakolwa. Ka hona, kamehla ho na le khaello ea chromosomal.