The risk for chromosome abnormalities is around two percent to three percent, with Down syndrome being the most common at one percent to two percent.
Umngcipheko weengxaki zeekhromozomi umalunga neephesenti ezimbini ukusa kwezintathu, yaye isifo solibaziseko lokukhula komzimba nengqondo sesona sixhaphakileyo kwiphesenti enye ukusa kwezimbini.