Table 1.

Classifications of chromosomal abnormalities

karyotype classification	n(%)	Karyotype
Group A
Standard monosomy	16(31)	45,X
Group B
Isochromosome Xq	16(31)	46,X,i(X)(q10); psu idic(X)(p11.2),46,X,i(X)(q10)[16]/45,X[7]/46,X,r(?) [6]/47,X,i(X)(q10)x2[2];
X Mosaicism	7(13)	45X/46XX
Ring	3(6)	46,X,r(X)/45XO; 45,X[14]/46,X,r(X)(p11.2q24)[6];
structural abnormality of Y chromosome	3(6)	idic(Y)
Deletions Xp	1(2)	46,X,del(X)(P11.1)
Y Mosaicism	1(2)	46,XY[32]/45,X[18]
Others	5(9)	46,X,der(X)(pter->q21::p11.2->pter); 46,X,del(X)(q27); 45,X,t(4;7)(q25;q31.2); 45,X/46,X,psr