This was within around four weeks for the monthly survey, from May to September 2020, but is now around two months for the quarterly survey.
Ym mis Medi 2020 roedd canolrif yr amser aros ar gyfer profion diagnostig yn 9.2 wythnos, i lawr o 10.6 wythnos ym mis Awst 2020 ond yn fwy na’r 2.6 wythnos ym mis Medi 2019.