Instruction Source:
Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)
Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)
Q91Trisomy 18 and Trisomy 13
Q90-Q99Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
Q00-QA1Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders