O 1 Ionawr 2022, mae Sgrinio Serfigol Cymru wedi ymestyn y bwlch rhwng profion sgrinio serfigol arferol o dair blynedd i bum mlynedd. Mae'r newid hwn yn berthnasol i bobl â cheg y groth sy'n 25 i 49 oed - os na chanfu feirws papiloma dynol yn eu prawf sgrinio serfigol. Y rheswm am y newid yw'r ffaith bod y prawf sgrinio presennol yn fwy cywir na'r prawf sgrinio blaenorol. Golyga hyn y bydd y bwlch rhwng profion sgrinio ar gyfer y grŵp oedran hwn yr un fath ag ydyw ar gyfer pobl rhwng 50 a 64 oed.
As of 1 January 2022 Cervical Screening Wales (CSW) has extended the routine screening interval for people with a cervix aged 25 to 49 from three to five years - if human papillomavirus is not found in their cervical screening test. This is as a result of the current screening being more accurate than the previous screening test. This brings the advice for this age group in line with the screening interval for those aged 50 to 64.