Mae gan Gymru wyth o raglenni sgrinio cenedlaethol. Maent yn seiliedig ar dystiolaeth gadarn sy'n dangos bod manteision y rhaglenni hyn yn gorbwyso'n sylweddol unrhyw niwed posibl sy'n gysylltiedig â hwy. Mae'r rhaglenni wedi ennill parch mawr ac maent yn rhan hanfodol o ofal iechyd ataliol a darbodus.  Pan fydd ymdrechion i wella'r niferoedd sy'n manteisio ar y rhaglenni yn cael eu targedu'n briodol, mae ganddynt hefyd y potensial i leihau anghydraddoldeb.
Wales has eight national screening programmes. They are based on robust evidence which demonstrates that the benefit of those programmes significantly outweighs any potential associated harm.  The programmes are universally respected and are a cornerstone of preventative and prudent healthcare.  When efforts to improve uptake are targeted appropriately, they also have the potential to reduce inequalities.