Abantu abasengozini nokuvinjelwa kwe-trisomy 21 (Down syndrome)
- Ukukhulelwa usumdala. Owesifazane maningi amathuba okuthi abelethe ingane ene-Down's syndrome njengoba ekhula. Amaqanda akhiqizwa abesifazane asebekhulile asengozini enkulu yokudala ukungajwayelekile ekuhlukaneni kwama-chromosomes. Ngakho, lapho ngineminyaka engu-21, amathuba okukhulelwa kwengane ene-Down syndrome angu-35 kwabangu-21. Kweyoku-1, angu-400 kwabangu-45.
- Ngemva kokubeletha ingane ene-Down's syndrome esikhathini esidlule. Owesifazane obelethe ingane ene-Down's syndrome unengozi engama-21% yokuba nenye ingane ene-Down's syndrome.
- Yiba umthwali wofuzo lwe-Down syndrome translocation. Iningi lamacala eDown's syndrome avela engozini engeyona eyifa. Kodwa-ke, amaphesenti amancane wamacala aveza ingozi yomndeni yohlobo lwe-trisomy 21 (translocation trisomy).