Ar hyn o bryd, mae menywod yn cael eu sgrinio am arwyddion cynnar posib a allai arwain at ganser ceg y groth drwy broses a elwir yn sytoleg - edrych ar gelloedd dan ficrosgop er mwyn gweld unrhyw annormaleddau. Cyhoeddodd y Gweinidog Iechyd y Cyhoedd a Gwasanaethau Cymdeithasol,  Rebecca Evans y bydd menywod yn y dyfodol yn cael eu sgrinio am brif achos canser ceg y groth yn lle hynny - sef y feirws papiloma dynol risg uchel (HR-HPV).
Currently women are screened for the potential early signs that could lead to cervical cancer through a process known as cytology – the viewing of cells through a microscope in order to identify abnormalities. Minister for Social Services and Public Health, Rebecca Evans, has announced that in future, women will be screened for the main cause of cervical cancer instead – high risk human papillomavirus (HR-HPV)