mpumalangabased medical practitioner dr midah maluleka says: "there is an extra number 21 chromosome (trisomy 21) which causes delays in physical and intellectual development.

ngaka midah maluleka, e leng ngaka e dulang mpumalanga o re: "ho na le dikhromosome tse 21 ( trisomi 21) tse fetang tse bakang tiehiso kgolong ya mmele le kelello.
